I have an interesting problem that I have had a devil of a time figuring out. My setup - I have a last-gen iMac with my iTunes library located on an external drive attached through USB. I stream to my Airport Extreme hooked into my stereo located in a different room. If I use the iMac to stream - no issues. If I use my iPhone or iPad to control the stream - again, no issues. If I use Screen Sharing and control it that way - no problems there either. The ONLY time I get any dropouts is if I try to use Home Sharing and control the streaming from my MBP. Both Macs are running Lion. This setup worked fine until I moved 2 weeks ago. Some network setup and nothing has changed. Except one thing - I no longer have the library attached to my MBP, but now have it on the iMac. Distances are actually closer so I doubt it is a signal strength issue. I have searched and Googled and have not found a definitive solution. Does anyone have any suggestions?