I have noticed in the versions of LimeWire after (but not including) 2.2.0, the CPU utilization at all times is extremely high, often bouncing up to over 90%. This is the reason I am still using 2.2.0. It is still there in the CVS version as of a few days ago.

Setting the process priority down helps some, but it still bogs down the system. I am going to be forced to move to another client if this is not fixed.