Has anybody seen this error before?
The file /home/domain/public_html/login.php is corrupted.
no. i suggest you reinstall and if its not working log a support ticket with cpvlab
For other peeps that may have this problem...
I reinstalled the login.php i can log in again,
Robert hasnt seen this problem before which has me freaked out cause i have a big fat "0" for leads for the day,
i hope other shit isnt goin that i am not aware of.
I would strongly suggest knstalling the application in a subdirectory other than html root. Keep the script kiddies guessing 
so rather then putting cpvlab on:
cpvlab.yourdomain.com/
(ie in the root)
do something like:
yourdomain.com/illusions/
or whatever other random word instead of illusions
there was an issue with cpvlab a long time ago but thats been fixed.
to make your install more secure make sure you keep your log folder clean and rename your login.php file