Hi EatMan
If the project is very large (could be caused by having a lot of music, sprites, scripts etc: ) then the Java player can't load it fully.
The only solution is to tell everyone to download the project in the projects notes
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Acutually it is because your java heap memory is too low. Yes, because of the file being big but mostly because it is low. You can download it but its not the ONLY way. To increase your java heap memory click the link to learn how
http://scratch.mit.edu/forums/viewtopic.php?id=8366
hope the link and this post fixes your problem
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