I have edited several hours of HD video from a Sony HDR HC7 camcorder into a one-hour video. Capturing and editing the video with CS4 went just fine, although opening the footage and rendering it is very time consuming. However, I have been unable to export to tape without encountering several glitches on the tape. I define a glitch as a stop and start in the video, ranging from one-half to one second. I have discussed my problem with Adobe technical support numerous times, and have tried everything recommended. This includes the installation of a dedicated dual internal hard drive in the RAID 0 configuration, adding one GB of RAM using Windows, striping the tape, optimizing the system according to Adobe instructions, etc. etc. I have a quad system, 2.33 GHz, with 3.2 GHz RAM (apparently only 3 GB is effective), which contains all of the components recommended by Adobe for using CS4 with HD. I am using Windows XP, version 3, 32 bit. I have no problems when I export a standard definition version of the video. I even rented a different camcorder, a Canon HD20, which resulted in fewer glitches (in fact I was able to export one complete tape with no glitches, but only one.) I welcome any suggestions!
I guess first I have to ask why you want to recompress and go back to tape?
On to comments on solving your problem. Are you trying to reuse old tapes?
Recently I have started even having a few glitches in new tapes and yes I have run a cleaning tape several times through the cameras and the only tape I have ever used is Sony HDV tapes.