PD6 won't boot into 32 bit kernel on new Mac Pro

When the new Mac Pro came out, PD5 caused kernel panics on startup. The Parallels team quickly ID'd the problem and issued a new PD5 build that fixed it

Now I've installed PD6. It works fine under the 64 bit kernel on my Mac Pro, but if I try to boot into the 32 bit kernel, which I sometimes need to to use some hardware - it hangs on a light blue screen before login. I've filed a bug. Anyone else experience this? I'm running a 12-core Mac Pro, 10.6.4 build 10F2521.