This was about 1 month ago.
Long story short. I had a huge base which had lasted for over a month without any problems. Then I started playing around with the IC crops. Spent about 10 hours growing and breeding crops. Then the entire region where I was growing crops became corrupted. If a player came to within about 250 blocks of the area I was growing crops on then that player would go down to about 1 FPS and the entire server would start lagging for everyone. As soon as the player got out of the area the server lag would stop. This had never happened before in the servers history and it started a few hours after making the crop plantation. It was a tekkit server but the only devices used in the base was IC machines.
I nuked the entire base to destroy every crop but the laggy region still remained and even today if anyone goes near that area their screen freezes the whole server lags.
For this reason I haven't dared touch the IC crops again because I'd really prefer not to lose another base.