Hi Frederic,
Looks like with that image I can reproduce the hang! Hopefully this enables the CameraBits team to fix the issue(s).
Update: I looked at the file with Exiftool and while the validation only indicated minor issues, there really is a problem with the file, at least enough for PM to misinterpret the metadata (the lens ({lenstype} variable) for instance is reported in PM as Âc. Garbage, of course, but all the more interesting since Exiftool doesn't seem to find any lens data in the file…
$exiftool -a -validate -warning P1240215-Panorama.dng
Validate : 4 Warnings (all minor)
Warning : [minor] Odd offset for IFD0 tag 0x83bb IPTC-NAA
Warning : [minor] Odd offset for GPS tag 0x0002 GPSLatitude
Warning : [minor] Odd offset for GPS tag 0x0004 GPSLongitude
Warning : [minor] Odd offset for GPS tag 0x000d GPSSpeed
I'm pretty certain the metadata problems in the file is what is causing the hang of the scan to catalog.