Thanks for your bug. Do you use any acceleration for your videocard?
Could you attach your xorg.conf? Does it happen using fglrx or vesa as
driver?
** Changed in: pango1.0 (Ubuntu)
Sourcepackagename: pango1.0 => None
Status: Unconfirmed => Needs Info
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Accelerator underlines are broken
https://launchpad.net/bugs/42962