Alt+Left, Enter, Repeat.
The dance some people do when they see the CantOpenWikiDbForUpdate error.
A humble plea: if you find yourself doing this, use some sort of random, increasing backoff. For example, I get CantOpenWikiDbForUpdate, I hit AltLeftEnterRepeat, I get the error again; I count to 5 before trying again; I count to 10 before trying yet another time; 20; 40; etc. (The randomness comes from counting, rather than looking at a watch.) -- GeorgePaci
Other keystrokes that might work better than Alt+Left, Enter:
Using M$IE, pressing F5 doesn't always work. And if it fails you lose your changes.
I suggest that people list here their favourite key/click sequence for each browser. In that way it might be useful and avoid the blanket statements that turn out not to be true in all cases.