ALWAYS BACKUP YOUR DATABASE!!!!!!!!!!!!!!!!!!!!!!!!!!! If you don't have your original working backup, don't post and waste our time.
P.S. No excuses; and sorry for such thread digression.
drbyte:
"Remember, THAT particular fix is ONLY suitable for v1.3.x.
Newer versions will require a different structure on that table ... A better fix would be just to do a REPAIR TABLE whos_online instead
I haven't experienced this disaster so far... my flagship Zencart URL still lives on. http://www.scienscope-products.com without any trouble at the moment. My ISP is he.net, cherry server. But I have used the code mentioned by Merlinpa1969" on my other accounts. It's definitely server-side issue.