Mozilla has released a chemspill for 7, but not for the bug you would expect (viz., the BEAST SSL issue we talked about last blog entry). Instead, this release covers bug 680802 and an unusual case where simultaneously trying to update the browser and an add-on causes the add-on to be apparently lost (in reality it is simply hidden and doing operations in the Add-on Manager will "resurrect" it).
After reviewing the bug, this appears to be another case where our more limited functionality saves us again. Although I can think of some scenarios where you could get a simultaneous update, because TenFourFox forces you to download a whole new copy of the browser for updates due to our more limited infrastructure you will rarely be updating both add-ons and the browser at the exact same time; instead, you update TenFourFox, it downloads new versions, and life goes on. It is possible to trip the bug, but you really have to work at it and I'll just let you think of how that might occur. I have only had one report of Adblock getting waxed updating to 7.0, and the user was able to manually restore it afterwards.
Because point releases are expensive for us and because I believe the risk is low, the current plan is not to release a 7.0.1. If you are one of those few unfortunate people who did manage to figure out how to louse up the browser and your add-ons, Mozilla has an add-on (ha!) that will temporarily patch the issue. You can download the add-on repair tool from Mozilla directly. Please report any irregularities.
8.0 beta is currently running in debugging mode internally. Mozilla, damn them, has significantly rewritten large portions of the widget toolkit requiring some extensive backouts and patching to work on 10.4, so we will likely drop parity shortly with widgets. The browser, however, basically works and I hope to have the beta out by the end of the week. There are some great TenFourFox-specific features in it too. More about that soon.