Hey Rory,
Here’s a strange artifact that I found. When you export a plugin as VST and host it in a DAW, and when I’m, say, playing back a track with the FX loaded, and when I hover over a control and it’s popup text pops out, it freezes the GUI of the DAW. It doesn’t affect performance or functionality, but visually, it just stalls the DAW, till I move the mouse pointer away.
I’m running Reaper 64 bit on Windows 7.