Plugin Error?

Just got this error:

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 92160 bytes) in /home/brandonh/public_html/blog/wp-admin/admin-header.php on line 91

The only thing I’ve changed today is installing and activating the wp-db-backup. Surely this couldn’t have caused it?

If anyone could offer advice, I’d appreciate it.