[Pharo-project] FileSystem differences between Pharo-2.0 and Pharo-1.4

I'm starting a port of FileTree to Pharo-2.0 and I'm planning on using Pharo-1.4 (summer) to do the actual port, since I can't run my development environment in Pharo-2.0 (chicken and egg problem). I'm wondering if there are any significant differences between the FileSystem implementations on the two platforms that I should be aware of... Dale