The bug has been opened on https://launchpad.net/bugs/92296
"Binary package hint: evince
Feisty on amd64. After recent update of poppler, there is a terrible problem with text rendering in some pdf documents. I have problems with this file http://lpsc.in2p3.fr/gpr/MURE/pdf/UserGuide.pdf. Other files I tried are rendered even nicer than before.
screenshot comparing text rendering in evince and xpdf
I add a screenshot comparing xpdf and evince."
The update makes poppler use libcairo
*** This bug has been marked as a duplicate of bug 5859 ***
wrong duplicate number
*** This bug has been marked as a duplicate of bug 5589 ***