500 Server Error when adding 2nd profile to registration page

[socksdavid]

CIVI 4.2.7

Hello,

I created a event registration page.  Payment processors are Paypal and bill me. I have two profiles on the registration form.  One is just general registrant data, the second is a custom profile with two custom data fields.  They are participant data linked to event name.  When I turn off this profile, the registration process is complete.  When I turn it on, I get a 500 server error.  I was running 4.2.0 then upgraded to see if that helped. After upgrading, the problem is not corrected and the database has now logged the following errors upon submitting a registration:

Warning: Invalid argument supplied for foreach() in CRM_Core_Error::formatBacktrace() (line 601 of /home/orcan/www/www/sites/all/modules/civicrm/CRM/Core/Error.php).

Notice: Undefined index: args in CRM_Core_Error::formatBacktrace() (line 601 of /home/orcan/www/www/sites/all/modules/civicrm/CRM/Core/Error.php).

Not sure what else to do.