luacs1998

Check to make sure paulscode is properly installed. Or get a better mac archiver.

Post in this thread if you would like to have a subforum for your mod. You must already have a forum thread on this forum in the Mods section, and your forum thread must be busy enough (75+ posts) For modder support ranks: Go to your forum profile, and under Primary Usergroup, select "Forge Modder". I have opened up the group access to all, but please do not abuse it.

I suspect extendeddecorations is calling a client class on the server. Bug your mod author.

A mod isn't runtimedeobf enabled - but mc isn't supposed to crash.

Must be your bukkit plugins, in which case don't ask us.

Read eaq

Have you installed everything in the forge zip to your jar?

Buildcraft issue, talk to them

Logs?

Nah, 95% of fml installs come with forge anyway, there isn't much reason for you to be installing fml without forge...

No, as forge comes with fml.

[lmgtfy]minecraft id resolver[/lmgtfy]

One of your mods is outdated.

If not use the batch files in the eaq.

I meant, update to 598.

I'm gonna pull a straw here and say you're getting the @mcversion crash, so do as Lex says and update. And bug chickenbones to update his coremods, as runtime deobf doesn't affect coremods. Nothing much we can do.

I'll bring it up to Lex's attention when he comes back from PAX. Or if cpw sees this, all the better.

The classloader is choking on one of your mod classes. Read your log.

If it still breaks give us logs.

Here's a hint, update your coremods.

Logs?

Update forge

That's a poor man's FML log. Reinstall java.

https://github.com/MinecraftForge/FML/commit/ce949e6099fe2a63ee6774acd6e55aa55d3b3673

Update to latest.