did the 1.4.1 upgrade
removed the blank line on top of version.php
try to log in backend and is redirected to the login page...
tried resetting user password etc without any luck.

Cannot access backend.

Anyone else got this problem?
Any fix?

Try to clear cookies of your browser. On our own site it worked for me..

NOPE did not work.
tried resetting admin. did not work

Well, it might be something different. Any errors in the server log?

Deleted cookies and cleared the cache while I was at it. Worked for me.

Thanks
MK