Ok guys... I have found a solution..but this is not a bug fix.. I think this problem comes with incompatibility of the font Ubuntu. I have changed the fonts and its working fine now.
Goto Appearance and Preference
Change these fonts to Verdana (I changed to verdana.. don't know about other fonts)
Application font | Desktop font | Window title font
Ok guys... I have found a solution..but this is not a bug fix.. I think this problem comes with incompatibility of the font Ubuntu. I have changed the fonts and its working fine now.
Goto Appearance and Preference
Change these fonts to Verdana (I changed to verdana.. don't know about other fonts)
Application font | Desktop font | Window title font
Cheers,
Inoka