Personally, I can deal with this kind of stupid report, by ignoring them. But on the other hand, even if it's one or two report like explaining why somebody just drop my quest (broken, too hard etc...), it will be a big help to improves/repair my quest.
On linux I use the same wine configuration than for Champions Online : Wine 32bits with dx9 and ie8. For the moment I can lauch the game without problem. I will see tomorow how are the perf ingame ;)
According to the wiki, Swordmaster is the paragon path of the Great Weapon Fighter and Iron Vanguard that of Guardian Fighter. No choice here ^^ BUT you have three tree of feats for one paragon path.
The more accurate description I can find about this is inside the Dragon Magazine 362 : (bold part) I think you can choose whatever method you want for you mage, it will okay with the law of the Forgotten Realm ;)