The physx sdk (on which dark physics is built) states that a new parameter was added in 2.8.1, likely the source of this changes:
Quote: "virtual void NxActor::wakeUp ( NxReal wakeCounterValue = NX_SLEEP_INTERVAL ) [pure virtual]
Wakes up the actor if it is sleeping.
The wakeCounterValue determines how long until the body is put to sleep, a value of zero means that the body is sleeping. wakeUp(0) is equivalent to NxActor::putToSleep().
Parameters:
[in] wakeCounterValue New sleep counter value. Range: [0,inf]
"
NxReal is a typedeffed float, ergo i think they are the same. So I would say use a nice high number. But only a guess. The Dark Physics board wioll no, but I am not mod so I cant move this.
The actor must be dynamic.
EDIT: or try using NX_SLEEP_INTERVAL, this may well work, and is the default value in PhysX.