The UI is fully reflowing, so you can just resize the window. I don't expect anyone to, though, if it needs to scroll I would say the description is too long already. I only see one option, the enchant rebalance, getting too long on my PC. Do multiple things overflow badly?
Not really. In fact, very little other than the Enchanted Item Rebalance does. The savegame corruption fix is also pretty long.
There are a few more that might get troublesome below 1440x900 (which is what I use on my laptop). I happen to know a friend of mine who still uses 800x600 (shudder) and 'though he can't play most games, Morrowind is one of the few that he can. When you start looking at a resolution like that, a few more become problematic. I'm not sure for certain, but I'd guess at Lighting fixes group, maybe the map expansion, the increase light falloff range and rain/snow collision are all potentially going to fall foul of it in a resolution as low as 800x600.
There might be even more, but those are the largest I could find. It's not a major problem at all, but having read somewhere that 1280x1024 is still the most common resolution for gaming, it makes me wonder about 800x600 as well.