I've had Logitech Z-10 speakers for about 7 months and I'm now having problems. Occasionally lose audio when I open a new app that requires audio. From that point on there is no audio until I restart my computer. If I switch the audio to the internal speakers on my imac it works fine. This only happens once in a while but it's really starting to urk me. I'm wondering if Leopard's upgrade has something to do with it. Anyone have any ideas or had a similar problem?