Which command are you using to create the quickfix errorfile? ":make"?
":grep"? ":vimgrep"? ":helpgrep"? Other?
Doesn't the QF window display the paths the way they appear in the
output of whatever created the QF errorfile?
Best regards,
Tony.
--
"What's the use of a good quotation if you can't change it?"
-- The Doctor