I am running Daryna in a dual-boot system. I installed it because I was sure that you can trust a Mint beta edition
to be as stable as the final one may be.
I just downloaded and tried the Ubuntu Gutsy live. I did it to confirm a screen resolution problem I had. Yes, the bug is in Gutsy.
Just make sure you select SAFE GRAPHICS MODE when you try or install the live CD. That way, there won't be any problem with screen resolution.