There's a handy Merchant Utility in the freestuff - search for laetia. Version 1.2.4.1 was posted on 6th August. It checks filename lengths, and also the path structure for Mac compatibility. It's a PC only application, but if a Mac-less merchant (or freebie provider) uses it before uploading their wares, and the Mac user uses Maconvertor after downloading, all should be sweetness and light. :D