OK, so I'm relatively new to the iMusic thang, but as both cars have SD card readers (and one doesn't have a CD changer) it makes sense to load loadsa MP3s onto SD card. Which is all well and good, but I found out quite soon that the VW, two annabit years old, doesn't support the SD/HC cards, so 2Gb maximum is the limit. Well, that's still quite a lot of music, so NP. So I went out and bought a new normal SD card (gawd knows where the 2 or 3 I used to have have disappeared to) and loaded some MP3s onto it. These were mainly converted from youtube (as I only have some of them on vinyl) and they all play perfectly well on the laptop, both from disk and when copied to the SD card. Now the odd thing - these files all play fine in the VW, but the Audi refuses to play _nearly_ all of them. Anything burned from CD is fine, and about two out of the 30 or so tracks I'd converted also play OK, but the others simply skip over, or give 'file corrupt' type messages. Now I know fuck all about the contents of MP3 sound files, but maybe somebody else can explain what could be causing this odd behaviour. And how to resolve it, hopefully. Anyone?