The client has never crashed, it just hangs (sometimes up to a minute) in almost every action I perform.
We are not running it against any Domino 9 servers yet. However, because Domino/Notes is a client/server based installation, the version of the client does not matter. In any case, the behaviour of the client occurs when I simply right click the mouse; scroll through a list of documents; task swap any open tabs etc... The server is not even connected to, when the issue happens.
It is not an A/V issue, we use ESET Nod32.
Windows resource monitor does not show any unusual high activity.
I have uninstalled 9.0 and reinstalled 8.5.3 c/w FP3, because the new version is simply unworkable and I haven't got the time at the moment to investigate further.