@leocg
"Forced to change account password" might be just a bit strong... Opera apparently would have been fine with me keeping my password, so long as I didn't want to sign in ever again!
This whole debacle started because I thought it would be useful and convenient to sync the data between Opera running on my desktop and laptop, and my new desktop. When I looked at synchronizing Opera told me I had to sign in. So far so good, that made sense.
At least it made sense until Opera told me that my password was "Invalid" (not wrong, "Invalid"). Things went downhill rapidly from there.
The Only way Opera would let me log in was by creating a new password that it liked.
Then once I had created a new password, Opera refuses to sync my saved passwords. Opera says it can't sync the passwords because they were encrypted with the old password.
Opera also says that I can "reset" those saved passwords and supposedly not lose them, if I give it the old password. But when I enter the old password in the blank provided Nothing Happens . I've tried this from both computers, and both behave the same way.
So, I suppose you are right, Opera didn't "force" me to change my password -- it just didn't give me any other choice if I wanted to sign in.