Problem with jquery when i'm trying to remote

[eluser]Unknown[/eluser]
The quick solution is that if you are using JQuery 1.5.x, downgrade it to JQuery 1.4.x.

The reason is because JQuery 1.5.x has changed the way it uses ajax. In the validation plugin, the remote uses the ajax of JQuery (as long as I understand). A difference I have found is that in the URL is append a callback id. The problem is that it is passed through GET and you have to use it, but I don't know exactly why and how.

So, if any have a better idea or reason please post it. I think this is a regular problem and there's not yet a clear solution.