For now 2 weeks, my Notes client (9.0.1FP4) stops working after a little while (2~3 mins). The symptom is that clicking on a document in the inbox won't open it. And no other action will work.
I actually showed this behavior to a developer (Pei SP Sun) in the lab at Connect and the diagnostic was that the communication between the 2 processes stopped because of an out of memory error. But nlnotes shows the same problem. so it it is deeper in the C++ native code.

Anyway, I fully uninstalled it, ran nice.exe, and reinstalled a brand new copy without even keeping the data directory but bummer, I still have the problem.

Did that behavior happened to somebody else? Might be due to a recent W10 update, as it was perfectly working before Connect, on the exact same machine. If anyone has an idea, that will be greatly appreciated. Else, I'll submit a PMR as this is a blocker.