When I run chancecoin 2.5 wallet on windows 8, I get an 'Java Exception has occured' error. Is this a known issue?
It is not a known issue. I'll summon TwinWinNerD on this one. I think he has the client running on Windows 8. Perhaps you don't have Java 8 installed? See
http://chancecoin.com/participate for how to install that.
Magician
I can't help with Win 8. Have Win 7 prof and Win XP here and both work fine.
Java Exception errors happend with the NXT client too. Usually a reinstall of both Java and the client helped solving the issue.