One thing I've noticed, if I use the RoundCube navigation icons, then all of the problems with messages appearing not to move, or not being deleted, then things go smooth and accurate. Also the hourglass notice at the top-center of the page always displays. However, if I use the forwards/backwards navigation of my webbrowser (IE at the moment.), then the message list display does not always update, nor do I get the top-center update display.
Haven't coded HTML or JS in ages, but is there a way to prevent usage of the browsers navigation shortcuts, and force the use of RC's icons for navigation? Or perhaps the login screen should have a say something like "Please use the navigation icons within RoundCube, do not use your browsers forward or reverse features"?
Layman's guess, but when using the browsers forward/reverse, then the JS functions do not always trigger, and the browser is caching the main display page, and not showing a current view. And yes, Cache is set to false, but would a pragma no-cache prevent the browser from loading a stale page?
-- Dan Schaper