diff --git a/core/basethemelet.class.php b/core/basethemelet.class.php
index 06fadc20..445ada89 100644
--- a/core/basethemelet.class.php
+++ b/core/basethemelet.class.php
@@ -44,7 +44,7 @@ class BaseThemelet {
 		$h_thumb_link = $image->get_thumb_link();
 		$h_tip = html_escape($image->get_tooltip());
 		$h_tags = strtolower($image->get_tag_list());
-		$ext = strtolower($image->ext);
+		$ext = $image->ext;
 		
 		// If the file doesn't support thumbnail generation, show it at max size.
 		if($ext === 'swf' || $ext === 'svg' || $ext === 'mp4' || $ext === 'ogv' || $ext === 'webm' || $ext === 'flv'){
diff --git a/ext/image/main.php b/ext/image/main.php
index d2553606..4addd849 100644
--- a/ext/image/main.php
+++ b/ext/image/main.php
@@ -325,7 +325,7 @@ class ImageIO extends Extension {
 				)",
 				array(
 					"owner_id"=>$user->id, "owner_ip"=>$_SERVER['REMOTE_ADDR'], "filename"=>substr($image->filename, 0, 60), "filesize"=>$image->filesize,
-					"hash"=>$image->hash, "ext"=>$image->ext, "width"=>$image->width, "height"=>$image->height, "source"=>$image->source
+					"hash"=>$image->hash, "ext"=>strtolower($image->ext), "width"=>$image->width, "height"=>$image->height, "source"=>$image->source
 				)
 		);
 		$image->id = $database->get_last_insert_id('images_id_seq');
@@ -435,7 +435,7 @@ class ImageIO extends Extension {
 				",
 				array(
 					"filename"=>$image->filename, "filesize"=>$image->filesize, "hash"=>$image->hash,
-					"ext"=>$image->ext, "width"=>$image->width, "height"=>$image->height, "source"=>$image->source,
+					"ext"=>strtolower($image->ext), "width"=>$image->width, "height"=>$image->height, "source"=>$image->source,
 					"id"=>$id
 				)
 		);