Available menu skins in 2.4, with the commands to load them:
menu_skin default; menu_restart
menu_skin silver; menu_restart
menu_skin simplygray; menu_restart
menu_skin xaw; menu_restart
plasic came too late, unfortunately, but if you install Shaggy's pk3:
menu_skin plastic; menu_restart
1. Open Notepad
2. Paste: ÿþMSMSMS
3. Save
4. Open the file in Notepad again
You can vary the number of "MS", so you can clearly see it's MS which is causing it.