Prototype 1.5.1 is now out. Looks like they put quite a bit more stuff in there than you would expect for a minor version number, in terms of bug fixes and new features. From their highlight list:

• Incredible Selector speedup and full CSS3 support.
• Full JSON encoding and decoding support and options for improved security.
• Optimized Element#get/setStyle for cross-browser compatibility and speed.
• Various String method enhancements and fixes.
• The new Form#request method simplifies the common case of submitting a serialized form with XMLHttpRequest.
• Many form serialization fixes-if you had troubles before, now they’ve been squashed.

It also looks like that whole JQuery/Prototype kerfuffle about a lack of good documentation has born fruit. Documentation is being written and updated on a far more regular basis.

Technorati : ajax, announcement, prototype

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