[Solved] Bug in FileManager 0.3.0b1 ?

[blast2007]

After upgrading to v0.3.0b1 (I know it's a beta) from v0.2.2, an error appears while clicking on expand/collapse arrow section  in /admin/listcontent.php or on Expand / Collapse all sections.

Error is the following:

"Error the XML response that was returned from the server is invalid"
...
...
headers already sent by (output started /var/www/modules/FileManager/lang/en_US.php:188 in /var/www/lib/ajax/xajax.inc.php on line 678"

After downgrade back to v0.2.2 error disappear.

Can you confirm?
Regards
blast

[blast2007]

I found the (little) bug.
Just remove last empty line in file /modules/FileManager/lang/en_US.php, just after
?>

Regards
blast

[URAN]

Empty line is deleted, but still no good