i'm still running xp. so far no crashes here, the statusbar renders correclty too. if i find the time, i may check these issues in a win7 virtual machine...
( the crashes could be related to some png-files i removed from the theme, maybe i shouldn't have done that . )
regarding the tab-highlights:
try change selected_w8_h12.png in the theme folder with the file attached (2px line instead of one, applies to all buttons too).