There is not a bug in the software/firmware.
here is the issue: When you install the latest Version 10, it includes an internal limit feature. If you do not follow the install instructions exactly, the limits will not be set correctly and you may encounter them in your normal slewing co-ordinates. The instructions are very clear that you must do a full initialization and a full Sync from a known Park Position after installation of this Version 10. This will set the limits in the right place and you will not encounter them in your normal slewing.
Yes. it appears there is a bug in the latest firmware release (VCP4-P01-10). We'll have to ask Howard to get us a new release fixing this issue.
--- Kerry "