Krytom

I was getting similar crashes to this, except I already had the latest java. I think I've fixed the problem (no crashes so far) by updating the lwjgl files to the latest version (OpenAL64.dll being one of these files). Maybe all you need is Java 7, but if that doesn't work try what I did.

Ahh, thanks for the link on block ID dumps. Will definitely do that in future. I've only checked manually in game up until now. Went through with adding it anyway, and it works without having to change any block IDs (turns out Tekkit has a big Forestry shaped hole in it). All clients need to have added is the mod. All I've done is manually disable Forestry tin and copper generation in the config on the server, though I don't know if that's strictly necessary.

I am also going to try and install Forestry onto my new Tekkit 3 server. Has anyone come across any Block ID conflicts, or will it slip in just fine?

I managed to solve this problem by moving the files in tekkit's resources/mod/sound/ folder to resources/sound/. There may be a neater solution to this, but this worked.