Mark Lord? Did you fix something in HiJack afterall?

Yes, he did. The more recent versions of the Hijack kernel fix the "stuck jiffies" bug that was causing those freak lockups in the 2.0 betas.

The current-release 2.0 Beta 11 still has the bug in its stock kernel, adding a recent Hijack to 2.0 Beta 11 fixes the lockups.

The next public beta release will have Mark's fix built-in to the stock player software so that you don't need to install hijack to fix the lockup.