I have Microsoft Sync in my car and connect to it via bluetooth from my Eris. I stream Pandora and other internet music and sometimes use the Navigation app in conjunction with the music. However, I find that the Eris just can't handle both at once. If I have bluetooth connected and use Navigation the navigation starts up but freezes soon after and falls behind so I'm not getting accurate directions. If I turn the bluetooth off Navigation works again. Has anyone noticed this? It's extremely annoying!