>>119 Thanks so much Yunzo for looking into this! I am still getting the earlier reported problem, but now the error is a little different:
Internal error (may be bug or so, sorry). (SQL in filter->add_transfered_bytes_byip (each user) )
I have also found that if I come onto the website from a different computer with a different IP address, the problem does not occur. So it seems to only be happening from my home computer :(