I've been using Forge with 1.7 since 996 came out, and ever since then, leaves break (essentially) instantly. This wouldn't be a big deal really, but when they break on my little server I set up for me and my brother in-law, a Bukkit server, the leaves break and show to be broken, but they do that glitchy invisible I'm-still-here thing. So either log out or put a block where the leaves were. Rather inconvenient.
I've spent about 30 minutes messing around with it, and I'm almost positive Forge is the source. I took out all my mods in the mods folder, ran 1.7.2, and it still happened. On the server and on a single player test world. Then I ran 1.7.2 and 1.7.4 clean, and the leaves broke normally on both the server and in single player. I went back to check 1.6.4 forge and the leaves worked as they were supposed to then too.
Again, not sure if this is a bug or intended, and its not a giant deal in the grand scheme of things, but I figured I'd bring it up. Thanks for any answers and thanks to the Forge team for all their hard work