Ah hah! Infopop finally contacted me and found the problem. Here's their message:
----- Original Message -----
From:
To: Seibertron
Sent: Thursday, February 08, 2001 2:03 AM
Subject: RE: profile white screen error in beta 7.4 [Ticket: P-2001-0206-07-COHO-3J]
> Hello Ryan Yzquierdo,
>
> The problem was simple: one of your template files (the one used for editing profiles) was not uploaded correctly. Once I uploaded a fresh copy of the file, all was fine.
>
> Take care,
>
> Ted O'Neill
> CEO, Infopop Corporation