I've noticed that some pprograms have a problem like this: [url=http://img-up.net/?up=ScreenshotuMKuHQ.png][img]http://img-up.net/thumbs/ScreenshotuMKuHQ.jpg[/img][/url] You can see, that the Xarchiver icon is much too big. Adding a 16x16 icon solves this issue but I think Thunar should resize the icon by itself.
Here is the screenshot link again: http://img-up.net/?up=ScreenshotuMKuHQ.png
Could you please attach a screenshot in this bugzilla.
I think this problem is already fixed in Thunar 0.9.92
Well then I close the bug. Please reopen (with a screenshot attached in bugzilla) if you still have this problem