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Not yet. Think about all of the gem/plugin dependencies which may not be 1.9 compatible.

Technically, you could check your gems, see which ones are not 1.9 compatible, fix the gems, and then release. :)

But your saying that an out of the box rails 2.2.2 site works on ruby 1.9? If so, that's the first I've ever heard of it...

in the rails 2.2 release notes, it did mention 1.9 compatibility.

I think Rails itself works, the problem is the servers. Mongrel doesn't work on 1.9, and the others have problems too. Also the DB libraries.

Plenty of other gems don't work either, basic ones like JSON (works only in pure Ruby mode). Hopefully the stable 1.9 release spurs maintainers on a bit, but I imagine it'll take a while.

Then there are the DB libraries that only work in 1.9 like NeverBlock.

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