Quantum Rise 1.0.4 has been deployed to "address performance issues regarding memory leaks that were affecting some of our players." In addition, it adds a new utlility feature to EVE Online:

Need for Speed

• A new graph is now accessible in the performance monitor that displays information about memory usage in the client.

The full patch notes can be found here or below.

Patch notes for Quantum Rise 1.0.4, released 16 December 2008

FEATURES

Need for Speed

• A new graph is now accessible in the performance monitor that displays information about memory usage in the client.

Fixes

Need for Speed

• Memory leaks have been plugged in the graphics rendering engine’s resource management. The memory leaks would occur when switching to and from fullscreen, when locking the computer or when the screen saver activated, and also gradually over time.
• A memory leak in the market price history chart has been plugged. This memory leak could also potentially occur when viewing CONCORD billboards or when opening the settings menu.

EVE API

• Improving performance when fetching certificate information by character.

Miscellaneous

• A database performance issue causing excessive load on corporation member lookups has been fixed.