Official line from Lucasarts...
Hello,
The game only supports 32MB, 256MB, 512MB, 1GB, and 2GB memory sticks which have all proven to save in-game data correctly.
Your customer number is #######
Please refer to case #:: ####### if you have any further questions.
If you need further assistance, you can also reach us online at
LucasArts.com | Support. Please include all previous replies when/if responding to this message.
Best Regards,
Katrina P at LucasArts Technical Support
-----------------------
So there ya go, although it will work with the above fix.