diff --git a/helpers/files/deletepostfiles.js b/helpers/files/deletepostfiles.js
index 7faa1a4e..9c8f4526 100644
--- a/helpers/files/deletepostfiles.js
+++ b/helpers/files/deletepostfiles.js
@@ -3,15 +3,14 @@
 const { remove } = require('fs-extra')
 	, uploadDirectory = require(__dirname+'/uploadDirectory.js')
 
-module.exports = (fileNames) => {
+module.exports = (files) => {
 
-	//delete all the psot files and thumbs using the filenames
-	return Promise.all(fileNames.map(async filename => {
-		//dont question it.
+	//delete all the files and thumbs
+	return Promise.all(files.map(async file => {
 		return Promise.all([
-			remove(`${uploadDirectory}img/${filename}`),
-			remove(`${uploadDirectory}img/thumb-${filename.split('.')[0]}.jpg`)
-		]).catch(e => console.error) //ignore for now
+			remove(`${uploadDirectory}img/${file.filename}`),
+			remove(`${uploadDirectory}img/thumb-${file.hash}.jpg`)
+		]).catch(e => console.error)
 	}));
 
 }
diff --git a/helpers/files/imagethumbnail.js b/helpers/files/imagethumbnail.js
index 4481e566..585b35f9 100644
--- a/helpers/files/imagethumbnail.js
+++ b/helpers/files/imagethumbnail.js
@@ -2,12 +2,12 @@ const gm = require('gm')
 	, configs = require(__dirname+'/../../configs/main.json')
 	, uploadDirectory = require(__dirname+'/uploadDirectory.js');
 
-module.exports = (filename) => {
+module.exports = (file) => {
 
 	return new Promise((resolve, reject) => {
-		gm(`${uploadDirectory}img/${filename}`)
+		gm(`${uploadDirectory}img/${file.filename}`)
 		.resize(128, 128)
-		.write(`${uploadDirectory}img/thumb-${filename.split('.')[0]}.jpg`, function (err) {
+		.write(`${uploadDirectory}img/thumb-${file.hash}.jpg`, function (err) {
 			if (err) {
 				return reject(err);
 			}
diff --git a/helpers/files/videothumbnail.js b/helpers/files/videothumbnail.js
index 713a80c9..6f9e4e02 100644
--- a/helpers/files/videothumbnail.js
+++ b/helpers/files/videothumbnail.js
@@ -2,17 +2,17 @@ const ffmpeg = require('fluent-ffmpeg')
 	, configs = require(__dirname+'/../../configs/main.json')
 	, uploadDirectory = require(__dirname+'/uploadDirectory.js');
 
-module.exports = (filename, geometry) => {
+module.exports = (file, geometry) => {
 
 	return new Promise((resolve, reject) => {
-		ffmpeg(`${uploadDirectory}img/${filename}`)
+		ffmpeg(`${uploadDirectory}img/${file.filename}`)
 		.on('end', () => {
 			return resolve();
 		})
 		.screenshots({
 			timestamps: ['1%'],//1% should remedy black first frames or fade-ins
 			count: 1,
-			filename: `thumb-${filename.split('.')[0]}.jpg`,
+			filename: `thumb-${file.hash}.jpg`,
 			folder: `${uploadDirectory}img/`,
 			size: geometry.width > geometry.height ? '128x?' : '?x128'
 			//keep aspect ratio, but also making sure taller/wider thumbs dont exceed 128 in either dimension
diff --git a/models/forms/deletepostsfiles.js b/models/forms/deletepostsfiles.js
index 45de002b..54b7bcdc 100644
--- a/models/forms/deletepostsfiles.js
+++ b/models/forms/deletepostsfiles.js
@@ -1,50 +1,48 @@
 'use strict';
 
-const { remove } = require('fs-extra')
-	, { Files } = require(__dirname+'/../../db/')
-	, uploadDirectory = require(__dirname+'/../../helpers/files/uploadDirectory.js')
+const { Files } = require(__dirname+'/../../db/')
+	, deletePostFiles = require(__dirname+'/../../helpers/files/deletepostfiles.js');
 
 module.exports = async (posts, unlinkOnly) => {
 
 	//get filenames from all the posts
-	let fileNames = [];
+	let files = [];
 	for (let i = 0; i < posts.length; i++) {
 		const post = posts[i];
 		if (post.files.length > 0) {
-			fileNames = fileNames.concat(post.files.map(x => x.filename));
+			files = files.concat(post.files.map(file => {
+				return {
+					filename: file.filename,
+					hash: file.hash
+				};
+			}));
 		}
 	}
-	fileNames = [...new Set(fileNames)];
+	files = [...new Set(files)];
 
-	if (fileNames.length == 0) {
+	if (files.length == 0) {
 		return {
 			 message: 'No files found'
 		};
 	}
 
-	if (fileNames.length > 0) {
-        await Files.decrement(fileNames);
+	if (files.length > 0) {
+        await Files.decrement(files.map(x => x.filename));
 	}
 
 	if (unlinkOnly) {
 		return {
-			message:`Unlinked ${fileNames.length} file(s) across ${posts.length} post(s)`,
+			message:`Unlinked ${files.length} file(s) across ${posts.length} post(s)`,
 			action:'$set',
 			query: {
 				'files': []
 			}
 		};
 	} else {
-		//delete all the files using the filenames
-		await Promise.all(fileNames.map(async filename => {
-			//dont question it.
-			return Promise.all([
-				remove(`${uploadDirectory}img/${filename}`),
-				remove(`${uploadDirectory}img/thumb-${filename.split('.')[0]}.jpg`)
-			])
-		}));
+		//delete all the files
+		await deletePostFiles(files);
 		return {
-			message:`Deleted ${fileNames.length} file(s) from server`,
+			message:`Deleted ${files.length} file(s) from server`,
 			//NOTE: only deletes from selected posts. other posts with same image will 404
 			action:'$set',
 			query: {
diff --git a/models/forms/makepost.js b/models/forms/makepost.js
index 8eb06981..4580a84f 100644
--- a/models/forms/makepost.js
+++ b/models/forms/makepost.js
@@ -155,7 +155,6 @@ module.exports = async (req, res, next) => {
 					filename: file.filename,
 					originalFilename: file.name,
 					mimetype: file.mimetype,
-					maintype: file.mimetype.split('/')[0],
 					size: file.size,
 			};
 
@@ -166,7 +165,7 @@ module.exports = async (req, res, next) => {
 			const existsThumb = await pathExists(`${uploadDirectory}img/thumb-${processedFile.hash}.jpg`);
 
 			//handle video/image ffmpeg or graphicsmagick
-			switch (processedFile.maintype) {
+			switch (processedFile.mimetype.split('/')[0]) {
 				case 'image':
 					const imageData = await imageIdentify(req.files.file[i].tempFilePath, null, true);
 					processedFile.geometry = imageData.size // object with width and height pixels
@@ -179,7 +178,7 @@ module.exports = async (req, res, next) => {
 						await imageUpload(file, processedFile.filename, 'img');
 					}
 					if (!existsThumb && processedFile.hasThumb) {
-						await imageThumbnail(processedFile.filename);
+						await imageThumbnail(processedFile);
 					}
 					processedFile = fixGifs(processedFile);
 					break;
@@ -205,7 +204,7 @@ module.exports = async (req, res, next) => {
 						await videoUpload(file, processedFile.filename, 'img');
 					}
 					if (!existsThumb) {
-						await videoThumbnail(processedFile.filename, processedFile.geometry);
+						await videoThumbnail(processedFile, processedFile.geometry);
 					}
 					break;
 				default:
diff --git a/views/mixins/catalogtile.pug b/views/mixins/catalogtile.pug
index 24b23caa..8689e1f1 100644
--- a/views/mixins/catalogtile.pug
+++ b/views/mixins/catalogtile.pug
@@ -17,7 +17,7 @@ mixin catalogtile(board, post, index)
 						img.catalog-thumb(src='/img/spoiler.png' width='64' height='64')
 					else
 						if post.files[0].hasThumb
-							img.catalog-thumb(src=`/img/thumb-${post.files[0].filename.split('.')[0]}.jpg` width='64' height='64')
+							img.catalog-thumb(src=`/img/thumb-${post.files[0].hash}.jpg` width='64' height='64')
 						else
 							img.catalog-thumb(src=`/img/${post.files[0].filename}` width='64' height='64')
 		if post.message
diff --git a/views/mixins/post.pug b/views/mixins/post.pug
index 1c089246..5e4a6d36 100644
--- a/views/mixins/post.pug
+++ b/views/mixins/post.pug
@@ -57,7 +57,7 @@ mixin post(post, truncate, manage=false, globalmanage=false, ban=false)
 									if post.spoiler
 										img.file-thumb(src='/img/spoiler.png' width='128' height='128')
 									else if file.hasThumb
-										img.file-thumb(src=`/img/thumb-${file.filename.split('.')[0]}.jpg` height=file.geometry.thumbheight width=file.geometry.thumbwidth)
+										img.file-thumb(src=`/img/thumb-${file.hash}.jpg` height=file.geometry.thumbheight width=file.geometry.thumbwidth)
 									else
 										img.file-thumb(src=`/img/${file.filename}` height=file.geometry.height width=file.geometry.width)
 			if post.message
diff --git a/views/pages/thread.pug b/views/pages/thread.pug
index bfe491dc..d0720f7a 100644
--- a/views/pages/thread.pug
+++ b/views/pages/thread.pug
@@ -11,10 +11,10 @@ block head
 	if thread.files.length > 0
 		if thread.spoiler
 			meta(property='og:image', content='/img/spoiler.png')
-		else if thread.files[0].hasThumb
-			meta(property='og:image', content='/img/thumb-'+thread.files[0].filename.split('.')[0]+'.jpg')
+		else if thread.files[0].hasThumb === true
+			meta(property='og:image', content=`/img/thumb-${thread.files[0].hash}.jpg`)
 		else
-			meta(property='og:image', content='/img/'+thread.files[0].filename)
+			meta(property='og:image', content=`/img/${thread.files[0].filename}`)
 
 block content
 	include ../includes/boardheader.pug