Ok, what does this error even mean?

[Xuphor]

I just got this error message in Opera:

Does anyone know what it even means? I'm seriously asking, as it has shown up a few times in the past, and when it does, it crashes whatever Flash thing I'm doing at the moment. I'd like to get rid of it.

 

[PityOnU]

I would find out where Opera writes its crash logs and go look in that location. Whatever you do or don't find there is a good place to start.

 

[Pleng]

"The operation completed successfully" - That's one hell of an error message!

My guess is it's a bug in Opera and you should probably report it to them. I'm further guessing that somehow they're either trapping an error that doesn't exist, or passing the wrong data into the error handling code. The error log is probably failing because the routine is being provided with no data to actually log.