I've been using this software for a couple years now and this the first time I'm seriously reconsidering (even after last years hacking debacle) it which is why I signed up to vent my frustration.
+1
This really starting to become concerning for our business and many others. October has been a disaster for WHMCS and believe a full audit on the core code of the software needs to be done (if it already hasn't).
I am starting to weigh up alternatives.