Here's a quick fix for the thumbnails of the
party garlands I shared in the beginning of this year. After you replaced the old files with these you'll still have to update the thumbnails in the game manually, however, but that's easy: Simply hold CTRL and right-click on each thumbnail.
DOWNLOAD GARLAND THUMBNAIL FIX If you have a similar problem with other thumbnails you should read this
Fixing Thumbnails tutorial by HugeLunatic. She has loads of useful information on her site! :)