When making a GET call via jQuery.ajax, jQuery 1.2.1 adds a URL parameter named '_' (the single underscore character) whose value is the current time stamp. I'm not sure I understand why, and in any case, this caused me some grief when I tried to use it in a Facebook app. The reason is that the Facebook API requires a "signature" parameter as part of each request, and this parameter is basically the MD5 hash of the rest of the parameters. So the extraneous jQuery parameter was not being accounted for in my code, causing Facebook to complain about an incorrect signature.
Perhaps someone can explain the need for this parameter. And perhaps it can be made optional in a future release? Just my $0.02. Regards.
