Autopano often reports focal lengths using "35mm eq.". As an APS-C user, I don't care about 35mm equivalent, and it just makes using the program more difficult.
Go to Edit > Settings > Images > Use the following value if no Exif data is found
I want to set 8mm, but I can't, because it wants a 35mm equivalent value, and I have no idea what that is. So I have to cancel, then load some images into a new group, click on Image Properties, and there I can set an 8mm focal length and select the Pentax K10D, which tells me the 35mm equivalent is 12.26mm. Then go back to Settings and paste that. It's a hassle, and unnecessary.
Hmmm...APG would need to get the crop factor value from somewhere in case of no EXIF.