Nah...I hacked ubb_profile.cgi with that line and no errors.
In my experience the extra profile field errors are situated in the .pl files. When I was upgrading to 6.4 I got the extra member's field error. To resolve that I just uploaded my edited .pl files to complete the upgrade with no errors. I did most of my template and .cgi edits on a testing board and when I upgraded I uploaded all .pl, .cgi and some of the vars files. That way members are not burdened by the hacks.
