The directions of sort arrows are reversed by Bug 467844. For example, compare old: http://mxr.mozilla.org/mozilla1.9.1/source/toolkit/themes/winstripe/global/tree/sort-asc.gif new: http://mxr.mozilla.org/mozilla1.9.1/source/toolkit/themes/winstripe/global/tree/sort-asc.png
I think what happened as bug 93772 swapped the file names instead of the usage? Anyway easy enough to swap it back.
Created attachment 380577 [details] [diff] [review] Patch (v1) This simple patch swaps the icons...
Comment on attachment 380577 [details] [diff] [review] Patch (v1) a191=beltzner fwiw, this is the last time I approve one of these without some sort of screenshot confirmation. the risk of further regression is obviously too high :(