Actually the problem is a bit different. Joomla! 1.6.0-BETA1 up to and including Joomla! 1.7.1 suffered from a feature/bug which had limited the session storage size to 32Kb (on 1.5 it is up to 2Gb). This causes the session to crash after a component upgrade, which causes the ACLs of that session to reset, which causes no menu items to appear and lose access to all components. I fixed that and the fix made it to Joomla! 1.7.2. So, if you are using Joomla! 1.5 or Joomla! 1.7.2 or greater you have no problem. Otherwise, you do have the problem you mention. I can't do anything except suggesting to upgrade to Joomla! 1.7.3. Sorry.
Nicholas K. Dionysopoulos
Lead Developer and Director
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