Is this a custom Indesign keyboard shortcut you created? Have you checked Edit/Keyboard Shortcuts to make sure your custom set is selected? My Custom set seems to revert back to the default every now & then.
No, that is not a custom shortcut he is referring to. That is a standard shortcut used across all Adobe applications.
I am having the same problem in Flash CS3 on a G5. The space bar to drag and command to zoom in and alt to zoom out sometimes work, sometimes not. It's really buggy and really frustrating and I am wasting a lot of time!
I have had this same problem while using InDesign and Firefox at the same time -- using Safari instead of Firefox seemed to help the issue. Not sure if this applies to your situation, but I hope this helps someone!
I just had this problem happen to me. Stumbled upon this forum post. I've been working in CS5 and always use Firefox and never had this issue but thought worth a try. Quit Firefox and went back over to InDesign and my toggle-zoom (Command-Spacebar) was working again. Launched Firefox and the shortcut continued to work. Odd that this program combination would do this. Perhaps something in the latest Firefox update that is conflicting? Anyways, thanks.
I too have had this issue with InDesign CS3, Illustrator CS3 and Firefox 3.6.15 MAC. I stumbled on this thread and tried deactivating add-ons. Didn't work. I closed Firefox and zoom keys worked again. Next, I reopened Firefox and the problem eventually came back, so I cleared my cache in Firefox. Works like a dream again.
for anyone that does not use Firefox and still sees this issue, i have traced it to Chrome as well.
the peculiar thing was that all i had to do was go into the "Extensions" area of Chrome's Preferences, uncheck one of the extensions to disable it and then the zoom shortcut worked. i then returned to Chrome and re-enabled the extension and the shortcut still worked?! i even was able to quit and restart InDesign AND Chrome and the shortcut still worked.
Running OSX 10.8.2
I have noticed this randomly happening lately with Illustrator and Photoshop. After reading about Firefox and Chrome, I shut down Safari (browser of choice) and that fixed the problem, even after I started Safari back up.
I do have Safari extensions, so when I become fully annoyed, I will probably go turn them off next time and see if it helps.