Or at least grouped together and something to indicate that they are special.
Build, Search and Untitled now sort by name. As does backup history "Version X of C:\..." (This one doesn't even have a unique icon).
Being able to sort by icon would help (but only if I can sort by multiple columns: Icon first, then name, then path, or Icon first, then path then name). Hm...I'm not sure that works since there is a different icon for modified buffers and I don't think I'd necessarily want that.