Hi, this is more of an FYI, since I can't really help pin down the exact cause of the problem.

Yesterday I saw a bunch of upgrades & did them en masse, one right after the other (silly way to do things, I know). The ones I upgraded were:
ReReplacer
AdvModuleManager
CacheCleaner
BetterPreview
ArticlesAnywhere
AdminBarDocker
ModulesAnywhere.

After doing this, my server became almost non-responsive; the CPU would max out, showing a lot of httpd and sql activity. Admin pages would load OK, but the web site would take over a minute per page to load, and sometimes not load completely.

Trial & error uninstalling lead me to believe that the culprit was Advanced Module Manager; uninstalling that resolved the issue.

But when I tried to "downgrade" to the previous version, the problem returned.

I then deleted ALL of the above mentioned extensions from my system & re-installed AMM 1.8.4, and it worked fine. I then upgraded to 1.9 and the problem recurred.

Revert to 1.8.4, works fine.

Side note, may be 1.8.4 only, but when I had "Mirror other modules" checked as an option, that would be the ONLY option that would appear on the edit modules page. Disable that, and all the other options re-appear.

In any event, Thanks for a great product, it's essential.

-Dane

Joomla version 1.5.18
PHP 5.3.1
Apache/2.2.14
running on Mac OS X Server 10.6.3

Working on a fix... sent you a file to test out...