I have finally got a full working 1.8 fix to the multi-parking bug. The fix involves a patch to the asterisk source code and the use of a thirdlane script to park the call, unparking works just as it did before. Confirmed that BLF monitoring still works. Also available is the means to silence the parking announcement when using blind transfer to park the call. Those interested should email me (my email in my signature so figure that part out) about hiring some consulting time to compile the patch in and install the script.