Thanks everybpdy for picking this up. I observed some additional unexpected behaviour today:

I have a profile with an Atik 383L CCD camera and an Atik EFW filter wheel.

When I start this profile I see all the equipment with the exception of the filter wheel.
The FW does not show up in the indi driver tabs and cannot be used.
In this configuration the train dropdown and edit buttons in the camera tab are greyed out.

When I edit the profile and remove the filter wheel, the train drop down and edit buttons are active.
However, in this case, I still cannot do exposures, the camera goes into "capturing" mode and hangs there.

When I add back the filter wheel to the profile, the boxes are greyed out again.

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