DCOP problems under maverick

Hello list, recently I upgraded to maverick and suddenly experienced problems with DCOP commands which worked always fine under intrepid, jaunty, lucid, and karmic. It seems that the QString support has been removed from DCOP in maverick. When I call dcop yakuake DCOPInterface slotRunCommandInSession 'cd /' in a console I get the message cannot handle datatype 'QString' The 'cd /' command is of course not executed in yakuake. Moreover it seems that all DCOP functions that take any QString as parameter or return a QStrings are affected by this issue. In other words: yakuake (and maybe also some other programs) cannot be remotely controlled anymore which is a pitty because I used the remote controlling functionality daily. I used to press F2 in the krusader to open a yakuake session in the current directory, but this does not work anymore. Did someone else experience this problem? Does anybody know how it can be fixed? Regards, Stefan