I believe I have encountered a bug in the detect script at gears.google.com. The error I am seeing is var buildInfo = google.gears.factory.getBuildInfo(); results in google.gears.factory.getBuildInfo is not a function
Here's the use case that resulted in it: User upgraded Firefox to 3.5 during the few weeks when Gears did not support the browser. Thus, Gears broke. Now that 0.5.29.0 is out, user with the broken Gears goes to http://gears.google.com/ to upgrade. However, the entire right side of the page at http://gears.google.com/ is blank - the blue box that detects if Gears is installed and offers the link to click here for installation is not coming up. The firefox Firefox Add-ons window does not detect Gears as having been installed either, so that's not an option. User tried removing the relevant Gears directories and so on, but nothing leads to the detection script working. I am pretty confident it's a bug in that script in the important case of someone having upgraded Firefox sometime in the last few weeks. Thanks in advance for your help with this.
