I tried out the Deezer music app on my WP7. The app itself is great.

However, I only listened to music for about 20 minutes this morning on my way to work, afterwards my battery will still 90% full.

Now 6 hours later, my phone is completely flat, and I've used 500mb data (half my monthly limit).

This has happened two days in a row, it seams that Deezer continues to download music (wasting power and bandwidth), even when it's not playing. Has anyone else had the same issue?