JBA ML - WH Serious Error Enquiry

We've just upgraded to 3.5.2b SP4 over the weekend.  And I've come up with a
small problem to do with Warehouse serious error enquiry, and was wondering if
this was some new functionality that had been placed in and if so if anyone else
has the same sort of problem or fixed it.

It would appear that we now get an error message telling us that there is a
Repenishment Error when there is no more stock in the warehouse to replenish
with.  Now you may think this is not to big of an issue but when we have an
average order of around 200 - 300 lines all picking 1 & 2 cases (Yes Cases not
pallets). And deal with an average of 600 Orders per day, this has become and
could become a an even bigger problem, as it is effecting our Replen monitor.

I thank and await your repsonses.

Jon