Just an FYI -
I was placing an order and received this error at the very end of the process:
ERROR: Please click here to restart site
1146 - Table 'nutraplanet_com_-_catalog.whos_online' doesn't exist
delete from whos_online where time_last_click < '1117554709'
I clicked where is said "Click here to restart site" and was taken back to the homepage. After checking my recent order status it looks like my order (#2796) went through OK, so I should be cool.
Just thought I'd point this out in case you need to take any action.