As the attached quickstart proves it, when issuing an Ajax request in Chrome 24.0.1312.56, the page reloads. Hence the action is often not taken into account.
On the same OS, but with Chrome 23.0.1271.95 everything works OK.
Opera 12.12 & Firefox 18 (Iceweasel 18 in my Debian) both exhibit normal behavior.
Unfortunately, I can't test on Windows or Mac since I don't have them neither at work, nor at home.