This is really odd, and I've hit a brick wall due to my lack of troubleshooting skills.

I can view anyone's profile, but if I try to view my own I just get a white screen. My first assumption was that it's a rogue plugin, so I carefully started disabling and re-enabling cb plugs to see what it might be. Here's my results.

1. If I unpublish both the Forum Integration plug and the GroupJive plug, I can view my profile just fine.

2. If I publish either of them, individually or together, I get the white screen of death when I try to view my profile.

So I'm now pondering what my next step should be. Any suggestions are very welcome!

Thanks for the heads up on the FAQ entry. When I enable GroupJive plugin and tab, the server error log tells me:
(one of these for each time I got the white screen)
[Sun Mar 27 14:30:26 2011] [error] [client "ip address"] File does not exist: /home/"me"/public_html/404.shtml, referer: http: // "mysite".com /index.php?option=com_comprofiler&Itemid=51
(spaces, quoted, added by me)

With site in debug mode, forum integration and groupjive enabled but not their tabs, CB shows this message:

Notice: Undefined index: postStats in /home/"me"/public_html/"mysite"/components/com_comprofiler/plugin/user/plug_cbsimpleboardtab/cb.simpleboardtab.model.php on line 104

...and the debug below shows:
MEMORY USAGE
71560032
249 QUERIES LOGGED

My php.ini file sets 128 meg as the memory limit. Could enabling tabs for these 2 plugs bump the memory use from 71 meg to over 128?

Should I bump the php.ini up to 256 perhaps?

krileon wrote: This is a known issue, please see the below bug ticket for proposed patch.

forge.joomlapolis.com/issues/2340

Thanks for the patch, k. That got rid of the debug message CB was displaying, but I'm still working on the white screen when viewing just "my" profile.

I've just noticed I have some redundant groupjive plugins and tabs in the backend lists. I'm thinking GJ 1.8 may have not been completely uninstalled before I installed GJ2. I'll look into that a bit more and post back with more detail.