I've got exactly the same issue than jensonc (works fine for internal mail but not for external mail). Oblige to kill the PID also to restart the client. It is a fresh OpenSuse 11 (no re-installation) with all updates applied... My feeling is that the problem should have something to do with the viewer (OutSide In ?)...
I changed the groupwise startup script like aforementioned, and I also have the external mail problem. I can click through all of my mail from my internal co-workers quite fast, but as soon as I click on one message from an external source, the client locks up. I then have to do a ps aux and kill the PID for gw.
Anyone make any headway on this issue yet? Web access for groupwise is fine for now, but I'd really like to get the client working again (as I'm sure you all would)
One thing to note, I just re-installed openSuSe11 yesterday, as my previous build of it would no longer boot after an upgrade to KDE4.1. But before I reinstalled, groupwise client was working PERFECTLY. For as long as I had suse11 installed (over 6 weeks I'd say). So I'm wondering if there is an update that I installed with this newest build of my laptop that is causing the conflicts with groupwise client. Maybe it's the new KDE? (I've always had desktop effects disabled, btw)