Hello,
I know we shall not report errors that are in the LL viewer too, but this one is a problem.
If you have hidden the UI (to take photos or something) and then a window pops up that needs acceptance (OK button or whatever), then the Ctrl-Alt-F1 to show UI elements again doesnt work.
You need to hit <enter> first to accept the window. This is an annoyance AND a security issue, as you never know what it is that just popped up.
Besides that it's a pretty bad thing in general, that even with a hidden UI the elements are still clickable. I'd really like them to be gone completely when the UI is hidden.
PS: An output in console window would be nice too, of dialogs that popped up but are unseen because of a hidden UI. ;D