diff --git a/apps/files/js/file-upload.js b/apps/files/js/file-upload.js
index b52221ac1f..f1ef485fc3 100644
--- a/apps/files/js/file-upload.js
+++ b/apps/files/js/file-upload.js
@@ -41,26 +41,6 @@ function supportAjaxUploadWithProgress() {
  */
 OC.Upload = {
 	_uploads: [],
-	/**
-	 * cancels a single upload, 
-	 * @deprecated because it was only used when a file currently beeing uploaded was deleted. Now they are added after
-	 * they have been uploaded.
-	 * @param {string} dir
-	 * @param {string} filename
-	 * @returns {unresolved}
-	 */
-	cancelUpload:function(dir, filename) {
-		var self = this;
-		var deleted = false;
-		//FIXME _selections
-		jQuery.each(this._uploads, function(i, jqXHR) {
-			if (selection.dir === dir && selection.uploads[filename]) {
-				deleted = self.deleteSelectionUpload(selection, filename);
-				return false; // end searching through selections
-			}
-		});
-		return deleted;
-	},
 	/**
 	 * deletes the jqHXR object from a data selection
 	 * @param {object} data
diff --git a/apps/files/js/fileactions.js b/apps/files/js/fileactions.js
index 67d3d5ead8..e14e52eb6c 100644
--- a/apps/files/js/fileactions.js
+++ b/apps/files/js/fileactions.js
@@ -177,20 +177,7 @@ $(document).ready(function () {
 FileActions.register('all', 'Delete', OC.PERMISSION_DELETE, function () {
 	return OC.imagePath('core', 'actions/delete');
 }, function (filename) {
-	if (OC.Upload.cancelUpload($('#dir').val(), filename)) {
-		if (filename.substr) {
-			filename = [filename];
-		}
-		$.each(filename, function (index, file) {
-			var filename = $('tr').filterAttr('data-file', file);
-			filename.hide();
-			filename.find('input[type="checkbox"]').removeAttr('checked');
-			filename.removeClass('selected');
-		});
-		procesSelection();
-	} else {
-		FileList.do_delete(filename);
-	}
+	FileList.do_delete(filename);
 	$('.tipsy').remove();
 });
 
diff --git a/apps/files/js/filelist.js b/apps/files/js/filelist.js
index 3c99e3876c..a929799677 100644
--- a/apps/files/js/filelist.js
+++ b/apps/files/js/filelist.js
@@ -804,7 +804,7 @@ $(document).ready(function(){
 				data.context.attr('data-mime',file.mime).attr('data-id',file.id);
 
 				var permissions = data.context.data('permissions');
-				if(permissions != file.permissions) {
+				if(permissions !== file.permissions) {
 					data.context.attr('data-permissions', file.permissions);
 					data.context.data('permissions', file.permissions);
 				}
diff --git a/apps/files/js/files.js b/apps/files/js/files.js
index 53858d65c6..37b6685884 100644
--- a/apps/files/js/files.js
+++ b/apps/files/js/files.js
@@ -369,7 +369,7 @@ $(document).ready(function() {
 			}
 		});
 	}
-	
+
 	//scroll to and highlight preselected file
 	if (getURLParameter('scrollto')) {
 		FileList.scrollTo(getURLParameter('scrollto'));
@@ -647,7 +647,7 @@ function lazyLoadPreview(path, mime, ready, width, height) {
 	// get mime icon url
 	getMimeIcon(mime, function(iconURL) {
 		ready(iconURL); // set mimeicon URL
-		
+
 		// now try getting a preview thumbnail URL
 		if ( ! width ) {
 			width = $('#filestable').data('preview-x');
@@ -656,9 +656,9 @@ function lazyLoadPreview(path, mime, ready, width, height) {
 			height = $('#filestable').data('preview-y');
 		}
 		if( $('#publicUploadButtonMock').length ) {
-			var previewURL = OC.Router.generate('core_ajax_public_preview', {file: encodeURIComponent(path), x:width, y:height, t:$('#dirToken').val()});
+			var previewURL = OC.Router.generate('core_ajax_public_preview', {file: path, x:width, y:height, t:$('#dirToken').val()});
 		} else {
-			var previewURL = OC.Router.generate('core_ajax_preview', {file: encodeURIComponent(path), x:width, y:height});
+			var previewURL = OC.Router.generate('core_ajax_preview', {file: path, x:width, y:height});
 		}
 		$.get(previewURL, function() {
 			previewURL = previewURL.replace('(', '%28');
diff --git a/apps/files/templates/index.php b/apps/files/templates/index.php
index 245c7f142d..5e7ad41b0f 100644
--- a/apps/files/templates/index.php
+++ b/apps/files/templates/index.php
@@ -19,8 +19,6 @@
 					<input type="hidden" name="MAX_FILE_SIZE" id="max_upload"
 						   value="<?php p($_['uploadMaxFilesize']) ?>">
 					<?php endif;?>
-					<!-- Send the requesttoken, this is needed for older IE versions
-						 because they don't send the CSRF token via HTTP header in this case -->
 					<input type="hidden" class="max_human_file_size"
 						   value="(max <?php p($_['uploadMaxHumanFilesize']); ?>)">
 					<input type="hidden" name="dir" value="<?php p($_['dir']) ?>" id="dir">
diff --git a/core/js/oc-dialogs.js b/core/js/oc-dialogs.js
index ac37b109e7..e5e9f6dbb7 100644
--- a/core/js/oc-dialogs.js
+++ b/core/js/oc-dialogs.js
@@ -294,7 +294,7 @@ var OCdialogs = {
 				conflict.find('.replacement .mtime').text(formatDate(replacement.lastModifiedDate));
 			}
 			var path = getPathForPreview(original.name);
-			lazyLoadPreview(path, original.type, function(previewpath){
+			lazyLoadPreview(path, original.mime, function(previewpath){
 				conflict.find('.original .icon').css('background-image','url('+previewpath+')');
 			}, 96, 96);
 			getCroppedPreview(replacement).then(