Moodle error: Query failed in load_user_capability

In Moodle 1.8 platform, whenever you encounter the captioned error during login, the /var is likely to be full.

The solution, obviously... clean up the /var to feed more free space to it.

Tracing IP and e-mail header information

I found some resources for tracing IP and e-mail header stuff...

Find the IP of the e-mail sender via header:
http://www.infobanc.com/articles/faida5_12.htm

Trace the IP location:
http://visualroute.visualware.com/