I've recently started playing on the HermitPack on FTB. I'm running it on a server and whenever a player unloads any chunks with IC2 machines in them, they disappear for that player. There's a shadow where they were, and you can't walk through them, but you can place other blocks in the same space as the machines and the new block won't disappear, but if youy break the new block, you will get both blocks back.
I don't think it's a server side thing, because the first time it happened my friend had been standing next to the machines the whole time, so the server never unloaded them. Anyone ever seen anything like that before or know of a way to fix it? It's very annoying trying to build Quantum Armor without ever unloading the machines.
To add to this, I also came across this problem in the same way - HermitPack 1.0.1 on FTB, my IC2 machines (macerator, solar panel, and extractor) disappeared for my friend who left the chunk, but not for me until I left the chunk. Worse still, when I restarted the server they seemed to actually be gone! I'm able to walk through the space where they should be now, and placing a block in the same location and breaking it does not yield the machine.
Same thing there! Yesterday started new hermitpack, crafted some basic ic2 stuff on my local server. After that i closed my client and today opened the game and feels a bit salty. I cheated machines, placed and restarted the client and all machines was gone!( Didn's find any problems in server console. Block update does nothig. Bad magic. Halp!) Really wanna play through this pack...