If we log in any indic or other locale having default language font metrics (ascent/descent) not matching with default ascii fonts then this problem happens

say for example:
log in in kn_IN (kannada) locale

open any application, where titlebar text in kannada script, everything will work fine

but if we open any application having titlebar text in ascii, border gets displaced, it appear as a underline in titlebar

I have try to find where is problem, so i think this is happening since there is difference in fonts properties

kannada locale uses default fonts Lohit Kannada, http://kojipkgs.fedoraproject.org/packages/lohit-kannada-fonts/2.4.4/3.fc13/noarch/lohit-kannada-fonts-2.4.4-3.fc13.noarch.rpm

lohit kannada's ascent= 850 and descent=-702 in hhea table

and default ascii fonts dejavu ascent= 1901, descent= -483 
i think somehow titlebar get scaled as per default locale (kn_IN here) fonts (lohit kannada here) but border get adjusted as per ascii fonts (dejavu here), so thats why this misplacements happen