I'm finding that the systray menu closes unexpectedly while I'm moving the cursor up the menu with the mouse. I have to try several times reaching applications towards the top of the menu without the menu closing on me.

Hello Ariel the Lion,

In LiberKey Configuration >> User Interface >> Menu open delay
what are your settings (default and custom) ?

It's set at zero. Is there a minimum delay needed to correct the problem?

Try to put 100 as custom (minimum possible), but what's the default value ? 400 ?

The default value on my home PC is 1 millisec. At work it's 0. When I set the custom time t0 100 milliseconds, the problem went away.