A few days ago you got the oportunity to play with the KDE 4 Krash snapshot release, now the okular team provides you with more Krashing experience. You can test okular, the multiformat viewer successor of kpdf. You are all free of sending comments to the team, but remember, a line of code is worth more than one hundred words, so join the party and help us supporting more formats or perfecting the existant ones!
You can get the tarball at KDE's ftp server.
Update: There seem to be some problems compiling the snapshot against latest qt-copy, have a look at this page to find how to solve it.