I installed openSUSE 13.1 just a week after its release. Unfortunately IBM Notes 9.0.1 crashed so I had to revert back to 12.3 since I wasn't able to fix the issue on my own.
By now the community have done what they do best and come up with a solution that makes it possible to run Notes 9 on openSUSE 13.1.
The issue was reported on the lotus forum.
In the response from Ben Kevan there was a link to a workaround that could get notes to run on openSUSE.
Apparently there is a bug that might be related to KDE. It has been filed on the KDE Bugtracking System as bug 329445.
Btw I am using the 64 bit version of openSUSE.