L0NE  Just use Inquisitor's installer and PS will pick it up automatically.

Documentation is in the pipeline, but not going to be out soon.  
(Version 1.5.1)

L0NE  This is a complete replacement for SIMBL that uses alternate injection techniques, which work (and will continue to work) under Leopard.  
(Version 1.0)

L0NE  Although it might not seem like Afloat's the culprit, its work-behind-the-scenes behaviour might still have influenced your crashes.

This means that your logs are still very, very valuable to catch bugs :)  
(Version 1.0b4)

L0NE  Ishan: There was much effort spent in the hope that restarting applications would be reduced to a minimum.

It would be a great thing if you could send me at afloat@infinite-labs.net the crash logs, so that I can figure out what's happening.  
(Version 1.0b4)

L0NE  Everyone, thanks.

@Appolyon: I'm planning to add preferences to the pane very soon (it's one of the most requested features). Also, animation is there but a bug with the Intel version of Mac OS X prevents it from working correctly on MacBooks and MacBook Pros, so it's turned off (but only for Intel users).

Thank you for your feedback, everyone.  
(Version 1.0b4)

L0NE  Jeki, I'm the developer of Afloat. Can you send me the crash logs, so that I can find the problem?

Afloat's support e-mail is afloat@infinite-labs.net and I'm online with the AIM screen name me@infinite-labs.net -- feel free to ask anything.  
(Version 1.0b4)

L0NE  Thank you :)  
(Version 1.0b2)

L0NE  Duly noted ;)  
(Version 1.0b1)

L0NE  Please note: SystemUIServer (menu bar, Spotlight, screen capture) crashes are due to an incorrect application of the patch, or having applied the patch to an already-patched (twice) or already-Front Row capable system.

Read the instructions before trying and it'll work. Don't, and face the consequences of your own actions.  
(Version 1.2.2b3)

L0NE  PAY ATTENTION, EVERYONE: from 2.3 on, the noncommercial licensing option is gone. Buying is now compulsory to use it past the evaluation stage.  
(Version 2.3)