Gmail spinning forever in Chrome, but fine in Firefox
This is most probably due to an extension that blocks either ads or Java or flash. Do you have flashblock or adblock installed?
I have clicktoplay enabled in chrome which results in the constant spinning wheel. If I select the option to Run all Plugins This time then the wheel disappears.
Try disabling all Chrome extensions and see if that works.
Did you try testing it and opening it in a incognito window in chrome?
That should remove any remove any plugins or cache etc.