Hi, I have a similar problem.
I recently upgraded to Lion, and now one my my plug ins also dont work. I am using Logic Pro 8.
For me it crashes when loading the PLAY plug in (with east/west Symphonic Orchestra).
The AU manager says, crashed during validation.
I have tried in both 32bit and 64 bit.
Anyone help please? This is a fairly vital piece of kit for me!
Thanks