Description of problem:
Fedora 8 original 'bind' works 100% with the following configuration line:

     allow-update { netop_admins; key gtf.org.; };

however recent Fedora updates caused a major regression, whereby named refuses
to run, giving the following error:
     mem.c:918: INSIST(ctx->stats[i].gets == 0U) failed.
     Aborted

Upgrading to Fedora 9, the same regression is present.

Removing the "key gtf.org.;" statement, or commenting out the entire
allow-update statement, fixes the problem and permits named to run.

This is a MAJOR REGRESSION.

This caused all my DNS servers to fail, when Fedora 8 automatic package updates
were applied, upgrading my bind server in Fedora 8 to bind-9.5.0-27.rc1.fc8.  As
noted, upgrading the systems to Fedora 9 did not help, the bug is present there too.

At the moment, my users are denied the ability to update their domains' in DNS
because of this problem.


Version-Release number of selected component (if applicable):
bind-9.5.0-32.rc1.fc9.i386
     and also
bind-9.5.0-27.rc1.fc8

How reproducible:
always

Steps to Reproduce:
1. create TSIG MD5 keys with version of bind previous to 9.5.0.
2. verify that all allow-update statements work as expected
3. upgrade to current bind
4. watch bind refuse to run
  
Actual results:
bind crashes

Expected results:
bind accepts "key gtf.org.;" statement, just like it did in earlier versions.

Additional info:
Full BIND config and zones available upon PRIVATE request.  I cannot give out
that data in bugzilla.