Help please, BIG PROBLEM

[skapa]

While restructuring my project tree when I listed the pages it gave me this error:

Fatal error: Call to a member function on a non-object in /web/htdocs/www.mysite.org/home/mysite/lib/classes/ ... nt.inc.php on line 2073

Please Help because I cannot enter any content now.
Thankyou in advance

[Ted]

I would suggest upgrading to 0.12.1.  I believe I fixed that bug.