Im running
bdlib-mc1710-1.6.1.39
generators-mc1710-0.9.7.35
and I'm required by Player to inform you I have
fastcraft-1.19 -> http://forum.industrial-craft.net/index.php?page=Thread&threadID=10820

LOGs:
1st when I place the block.
http://pastebin.com/RPurERF0
2nd when i trying to log back in.
http://pastebin.com/9WX32Wxt

Edit: just confirmed that all is well on single player Its just not happy on the server

https://github.com/bdew/generators/blob/mc-1.7.10/src/net/bdew/generators/modules/rfOutput/BlockRfOutput.scala

First stab, Seems to register icons on the client only, then reference them from client and server?

It's an error in my code. Fix incoming.

Icons and related stuff should never be registered or accessed on a server.

Try this versions (you need to update both):

http://jenkins.bdew.net/job/bdlib-1.7.10/40/artifact/build/libs/bdlib-mc1710-1.6.2.40.jar
http://jenkins.bdew.net/job/generators-1.7.10/36/artifact/build/libs/generators-mc1710-0.9.8.36.jar

been using it on my private sever since you updated no issues to report thanks for the quick update :)