The incorrect planet map bug is in the GOG version it's not game-breaking as all you need to win the game is Earth and Planet X all the other planets are just there for show and those are the ones effected by Origin's mistake when dumping the orginal disks.
The rollover glitch which only applies to health, I believe is still there but it's really, really hard to pull off as you raise HP at Lord British and Richard coded a form of a safe guard were it's really hard to roll over your HP unless you were really trying as the higher you max HP is the more it costs so if you close to rollover range it would cost you alot to raise you HP.
You can either patch the game or edit your PLAYER file when you get bitten by the problem. Here's a list of offsets if you choose the latter: http://shrines.rpgclassics.com/pc/ultima2/cheats.shtml
Here's Pix's patcher which will fix all of the bugs, add some new features if you wish, and is absolutely awesome: http://underworld.ultimacodex.com/pixs-ultima-patcher/