We've actually tried a few things:
With PyIndi, the problem is now that a Blob is not returned when a zero time bias exposure is taken. This also occurs if a nonzero exposure time is given. Lights and darks behave properly.

With a separate client, indi control panel (www.cloudmakers.eu/indicontrolpanel/), we get the error mentioned earlier "unknown selected CCD frame type! FRAME_BIAS" when we try to run a bias frame. Previously, when running the bias frame, it would simply complain about the zero exposure time.

As a side note, we have tried using an ATIK camera with the indi ATIK driver. Although this seems to support a bias frame, the exposure can not be of zero time, and the counts scale with time for longer exposure times, which would seem to be identical to taking a dark exposure.

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