This is latest Drupal on Win2K with PHP4RC1 and Apache 1.x.27.

The login script hangs and does not display the home page. The Apache error log tells me there is a PHP Notice, to quote:
"[Mon Nov 18 15:24:37 2002] [error] PHP Notice: argument passed to unserialize() is not an string in g:apacheapachehtdocsmodulesuser.module on line 80"

If I "Reload Current Page", I'm taken to the user page and all seems to work OK after that.

Second Issue: In addition, I was getting mySQL fatal error messages from the session UPDATE query because the 'user' table is not qualified enough; drupal.user seemed to fix that. Is that the right thing to do? Or is there some deeper problem that I'm just papering over?