I noticed this bug as well, it seems that everything that shares an ID with the Forester (Rainmaker, Treetap, Apiarist's Chest, Analyzer) results in a Forester presumably because its data value is 0. They are using ID 255 on my install... seeing as that is kind of a special value I suppose I'll try something else and report back.
Edit: Even after changing the ID (both client and server) to 206 it's exhibiting the same behavior, everything with that ID turns into a Forester on crafting. I'm not terribly concerned myself since I primarily installed a Bukkit setup to try to help someone with an issue, but if it leads to a fix then that's good. If anyone else is not having this issue please list which mods you're using and maybe we can pinpoint one that might be causing the issue if that is the case.