By thumbnails I mean the little picture beside the website title in the tab

 

Not sure when this happened exactly since I ignored it for a while. Using Opera 12.16 build 1860 on Windows XP, 32bit if it helps

For me it's still the little square

Well I figured it must be some funky thing unique to my setup seeing as it is a bit of a different browser and OS choice to what is common nowadays :P. It's just odd considering it did change *from* the squares to this.

 

EDIT - Deleted browser cache, it's still there

for me the coloured squares disappeared months ago, now it's just the standard white thingy :confused: