Maybe I'm wrong, but I see that you are using global xmlHttpReq objects in asynchronous requests. This could lead into problems, because a second (and successive) asynchronous request (i.e. a second vote in the page) will overwrite previous ones if they are not finished and you'll never receive a response from them.
There are some ways of solving this, for example, putting multiple xmlHttpReq objects in an array.
Sorry if I misread your code
citromatikIn reply to Re^2: Perlmonks AJAX Voting (greasemonkey plugin)
by citromatik
in thread Perlmonks AJAX Voting
by eric256
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