protalkers; When playing back any number of Logic Audio Mac audio tracks, <any> arrange page activity on unrelated audio tracks, ie; muting tracks and/or moving audio, results in a <total> audio playback drop out - all audio - lasting about 2 seconds. This does <not> happen when playing through the Mac-av outs, and does <not> happen in the Protools 5.01 application. The system is stable and has been working flawlessly for about two years: Mac beige G3, 256 meg ram, atto scsi accel, glyph 18 gig u2w drives, word clock by Rosendahl, all connectors hi quality, etc. Hardware is digi PT mix plus. We have done all of the obvious: Norton disc doc, FWB hard disc toolkit, atto, rebuilt desktop, zapped P-ram, trashed all preferences, re-installed Logic, checked extension sets. Any help is appreciated, ciao, s.h.