Don't remember that happening with the previous forum. I may have a bad memory though
Of course right now after update, it may be a few more busy than normal hours. But this is something to look after.
Also at google+ someone reported
Quote:MyBB SQL Error
MyBB has experienced an internal SQL error and cannot continue.
1040 - Too many connections
[READ] Unable to connect to MySQL server
Please contact the MyBB Group for support.