The current memory manager that the Linux (GTK) port uses and the new one for Mac OS X don't seem to recognize multi-block data. Although games that use multi-block saves are rare, they do exist (Ready 2 Rumble uses two blocks, Descent Maximum uses 3 per save).
Comments: ** Comment from web user: MaddTheSane **
Comments: ** Comment from web user: MaddTheSane **
This has been resolved on OS X (Barely before I rewrote OS X's memory manager). Waiting for input from other platforms before closing.