Funny you should ask. This just in...
Panama Red says that the new patch corrects the disappearing canopy rail problem and some of the shadow problems.
Now for a qualification. I have not seen first hand the disappearing canopy rails and have not been able to duplicate it. Thus, I don't need a "fix" for it personally. I also have only SF2 on that machine and no other versions of SF2. That means, I cannot use the new patch anyway because it patches the Expansion Pack only. So, if you have the problem AND you have the Expansion Pack, then download the fix and you are in.
As far as the goofy shadows, that is another Thirdwire glitch that I do have personally. I cannot be from the Expansion Pack since I do not have that installed. So if you have that problem, you would need to get the Expansion Pack and it's problems then the fix that is supposed to cure them.
In Summary. We are trying to test now to see if we are about to recommend something that will cause more problems.