I just wanted to do a final update :
tbworld thanks for your help.
1 - I got my forum back up and running
2 - I'm pretty confident that my forum is secure again
3 - After trying over and over to reinstall 4.2.2 - being unsure why I couldn't get the CMS or blogs to work, and then installing a clean version of 4.2.2 on a new environment and getting the same error - I realized it really was a memory allocation issue. Increasing that and restarting apache eliminated all of those issues. I suspect there are some functions in 4.2.2 that require more memory than in the previous version.
So now I'm off to find some good spam protection plugins - and all is well with the world again LOL
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