Hi guys,
I'm facing this slight problem at the moment - after the update to 1.5.4 (with one-click upgrade) my thumbnails in categories are missing all other images are fine except those. I've tried nearly everything - regenerating thumbnails, changing image type (from 'productlist' to 'home_default'), deleting cache, force compiling, etc. These images work perfectly on 'default' theme, though. I have also updated the theme to its latest version.
Any ideas?