Index: theme.php
===================================================================
--- theme.php	(revision 29199)
+++ theme.php	(working copy)
@@ -1435,15 +1435,21 @@
 			$template_dir = get_template_directory();
 
 			foreach ( $editor_styles as $key => $file ) {
-				if ( $file && file_exists( "$template_dir/$file" ) ) {
-					$stylesheets[] = "$template_uri/$file";
+				if ( $file ) {
+					$raw_file = strpos( $file, '?' ) ? substr( $file, 0, strpos( $file, '?' ) ) : $file;
+					if ( file_exists( "$template_dir/$raw_file" ) ) {
+						$stylesheets[] = "$template_uri/$file";
+					}
 				}
 			}
 		}
 
 		foreach ( $editor_styles as $file ) {
-			if ( $file && file_exists( "$style_dir/$file" ) ) {
-				$stylesheets[] = "$style_uri/$file";
+			if ( $file ) {
+				$raw_file = strpos( $file, '?' ) ? substr( $file, 0, strpos( $file, '?' ) ) : $file;
+				if ( file_exists( "$style_dir/$raw_file" ) ) {
+					$stylesheets[] = "$style_uri/$file";
+				}
 			}
 		}
 	}