I have been having this problem too with backend Admin changes to CB User Management. The Profile Changes do update after up to 60-70 seconds of waiting for Email Checker to finish with error (set to Off).
I noticed this after upgrade to CB 1.4, and after CB Tools corrected a few errors. Running Joomla 1.5.22. I also have installed CB Privacy plugin. But the problem exists regardless of CB Privacy Published or not.
I have added a tab that needs to be made invisible on Profile - so I'm working through each user to set this tab invisible, so the delay is painful. Is there a way to set this one tab to be invisible for all users? If so, then the current delay would not be a problem.
Thanks,
Tom