UBB.threads PHP Forum Software Community Forums UBB.threads Bug Reports Screen goes blank after update

I am using 7.5.4.2 at the moment and have noticed a problem when I make changes to certain CP items. For example, if I make any changes to the portal layout or make changes to an individual portal, and click submit, I get a white screen and it never returns to the CP. I have to manually go back to my site and re-enter the CP. This happens when I make any changes on things like Portal Setting, and Subscription changes, etc. It does not take me back to the CP.

Anything of significance in the webserver error logs when this happens?

Not that I can tell, no.

Blank pages always make me want to think of Mod_Security

I still have this problem if I delete a user who has not been verified.

I had to ask my host to change some limits which did cure a few problems but this one remains.