Comment 5 for bug 1087063

I suspect that this has something to do with the file's modification time, as I can "reproduce" this issue on Windows by changing the "modification time" of
C:\users\Public\Application Data\Microsoft\Cache\indiv01.key
after loading the page http://web.sldrm.video.msn.com/d1/sldrm.html and before hitting "Load selected media!" (the work around allows this to function). It's worth noting that I cannot change file times on
C:\users\Public\Application Data\Microsoft\Cache\S-1-5-21-0-0-0-1000/MSPRindiv01.key
while Silverlight is running (since the file is in use).

Also, I have a little trick for narrowing down the log (for Netflix, not for the above website):
cat netflix.log | grep -A 999999 status_acquiring_license_lsc | grep -B 999999 status_fatal_error_ls > netflix-error.log