Have you updated SF4 to the latest update? Is ID updated to 8.0.1? I had
occasional issues with SF3 but I have seen no problems with SF4 and the new
SF5 seems quite stable so far.
You might also try trashing your ID prefs.
I misunderstood the problem to be with InDesign but it's not. This is an Exensis issue. You can check with their tech support but SF5 is out now and I'm not sure what kind of support you'll get for SF4.
My apologies regarding your misbehaving InDesign CS6 auto-activation plugin. I am hopeful we can help you resolve the issue and I assure you regardless of our recent release of Fusion 5 we will get Fusion 4 working correctly for you.
Generally, when that spinner appears and doesn't go away, it's because there's a communication failure between the plugin and the font panel. Often, this can be because the plugin hasn't properly loaded (or is an older version), but sometimes the host application - InDesign - doesn't give the plugin the opportunity to set up the connection with the panel.
There are a couple of log items we can review to isolate where the problem is occurring but it's probably best served for our tech support team to handle this.
There is no charge for the contact and they will log the case in the event we need to provide a patch to fix the problem.
Feel free to email me privately with contact details so I can have someone reach out to you or you can contact us directly also.
Extensis Tech Support
To log a problem ticket:
Extensis Product Team
PS. Bob thanks for the assist we appreciate your support.