I am presently having several media offline on my Avid Xpress pro ver 5.8.3 with mojo.
My configuration are MAC pro 2x2.3GHz Dual core Intel Xeon,4Gb DDR2 RTR320 Avid external Raid drive 1Tb MAC OS 10.4.11.
We have a couple of Sony EX3 camcorder and footage (BPAV files) from the SXS card is normally ingested on a centralized storage. we use clip browser software ver 2.6 to convert to Xdcam DVcam.mxf format. The files are then migrated and imported into project bin in Avid via a portable drive.The imported files are checked in the source monitor and are OK.Afterward (sometimes one or two days later) editors report that their media are offline. A relink do not cure the problem, strangely a few files among the batch is OK.
Footage captured from Betacam tape do not suffer this problem, nor does media from graphics.