I figured it was intermitten as it has been installed for days now and this is the first time a member said anything.
And, since it doesn't effect me, I never caught it so I can't say for certain that it hasn't always existing, but I'm pretty sure that it didn't.
The only other AJAX thing I have installed is
ajaxReg - Ajax Registration, with instant field checking. But since they don't share any templates or whatever, I doubt there's a conflict.