This issue existed in the debug mode for a while, but I always thought it has to do with debug mode somehow and therefore never reported it. Now it also happens in normal mode.

See the screenshot below, which is from this script on fawiki. The submit button (ثبت نظر) used to be on the left and the cancel button (لغو) on the right, and now they are swapped. Also, the MenuTagMultiselectWidget object in the upper section is misaligned (the textbox is a few pixels to the right of where it should be).