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FF4 - Add-ons Manager opens with message: "You don't have any add-ons of this type installed" when I have 25 add-ons installed and usable

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Mac/FF 4. Title says it all:

When I go to the Add-ons Manager in FF4, no add-ons are listed, but I'm using the browser and all of my add-ons are available everywhere they're supposed to be.

I have 3.6.16 installed in another directory which uses the same add-ons.

Mac/FF 4. Title says it all: When I go to the Add-ons Manager in FF4, no add-ons are listed, but I'm using the browser and all of my add-ons are available everywhere they're supposed to be. I have 3.6.16 installed in another directory which uses the same add-ons.

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Same here. Not only this, many of my add-ons that are in fact compatible with FF 4 work for some time, but two browser restarts later, sporadically become disabled. What's up? What's happening? Is this a buggy piece of garbage that Mozilla has allowed to be released?

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