The Bugs and Glitches thread

but ill not update the following:
the 7th day issue:
it depends on time zones.

The glitch is straight-forward:

Time limited quests become available according to client clock, but can only be started according to the server clock (if you try at another time, "An unknown error has occured" pops up).

It doesn't just apply to the 7th day market quests but they are the most obvious ones.