I am experiencing a similar issue and would love a solution if it's out there. I found out that Catalyst Browse 1.2 is the highest version which allows me to see the clips on an XDCAM disc using a U1 drive. If I go above that version, clips don't show up at all....just the General folder like mentioned above. I think I know what's causing it, but I have no idea how to fix it. I have XDCAM Drive Utility 5.0.8 installed on the computer currently. When I put a disc into the drive, the Clip information comes up as ANY instead of saying the codec being used....etc. Other computers where it's working is set up the same exact way. On those computers, XDCAM drive utility displays the Clip information correctly. Only difference between those computers and the ones that aren't working is that the working computers have SSDs. Makes no sense because I matched up everything else.
Sorry to bump this up but I would love some type of insight on why this is happening.