open_basedir restriction in effect

Issue Summary

Hello,

I am getting an error message (may be due to my webhost's settings) when a user tries to upload their picture:

* warning: realpath() [function.realpath]: open_basedir restriction in effect. File(/tmp) is not within the allowed path(s):
(/www/virtualhosts/www.xxx.edu:/apps/hosting/local/php/lib/php:/var/
tmp) in /www/virtualhosts/www.xxx.edu/yyy/includes/file.inc
on line 188.

Is there some way to correct this issue or bypass it?

Thank you.