I upgraded half of our servers to 5.0 for the SSTP functionality. I noticed that on multicore x86 systems SSTP always restarts when there is a connection attempt. It would also log an SSTP :- internal error message, but no further details. The client computer would see an 809, 631 or 619 error and all other PPTP and L2TP connections are dropped as well.
I disabled the multicure feature using the resources menu and that seems to be a temporary solution (i.e: it has been working for 30 minutes now)
Geza