What does those increasing number of question marks mean - on systray?

Why they appear in Tray and as the minutes pass increase, these question signs:

At 11:02

I have more screenshots, but as new user I only can put one.

Thanks in advance.

This is caused by Qt tray integration. You can either try to disable translating system apps in Locale preflet or switch to a nightly image. Presumably, this was fixed in hrev56788.