Illegal use of reserved words

Did you run into any sort of problems with that?

Yes. While trying to minify using YUI Compressor the compiler return 66 errors. But in general it is not the best practice to used any language reserved words.

okay I see the point. Will fix it.

Btw how is the result with YUI against FrontCompiler?

It's 47k compressed, but gives much better performance gzipped.

have you tried the custom build without the self-build feature?

here
http://rightjs.org/builds

uncheck the 'self-build' checkbox. it should give you pretty much the same thing YUI builds.

Yes, very close. 47.6k vs 46.3 with YUI.

I would also suggest going through some of the for loops which still is some cases use i < var.length, and would also suggest using === everywhere for better performance.
Might also want to store navigator.userAgent is browser as ua: navigator.userAgent and using this.ua will save a few bites.

Going through the code to see if I can chop of a bit more of it.

There is also a mistype in cookie documentation "new Cooke" instead of "new Cookie". Get, remove and set are also there twice.

I've just had 47.5 with YUI 2.4.2 and RightJS 1.4.1

There are two methods at Cookie a class level and instance level

I've fixed the keywords and docs, and pushed the things to git. Will update the build in a minute.

No probs ;)