i haven't noticed any sort of bias with the random feature... but then i have 20gigs on there [my zen 2.0, which uses the same id3 tag heirarchy for the tracks]
i view it like i do the lottery... 53 numbers 6 slots.... here are a couple of winning number pulls from here in florida, is it random, bias, or just dumb luck... i am thinking the dumb luck that you are noticing the randomness not appearing so random. look to the big picture grasshopper
+T
09/14/05 03-06-11-15-39-51
09/10/05 07-20-40-41-43-47
09/07/05 01-15-21-40-46-49
09/03/05 09-11-18-27-40-51
08/31/05 03-13-14-19-23-53
08/27/05 02-14-21-23-32-34
08/24/05 06-07-13-29-44-53
08/20/05 22-30-37-42-44-51
08/17/05 24-28-31-32-34-52
08/13/05 06-19-21-27-40-51
08/10/05 02-20-22-32-40-44
08/06/05 16-22-25-28-39-53
08/03/05 04-11-21-30-32-46
07/30/05 19-22-24-29-30-34
07/27/05 07-09-26-32-40-51
07/23/05 01-08-15-36-37-44
07/20/05 01-06-09-16-22-43
07/16/05 01-20-33-35-37-48
07/13/05 04-13-21-33-34-47
07/09/05 06-08-18-32-38-45
07/06/05 01-11-18-24-25-47
07/02/05 01-15-22-30-48-51
06/29/05 01-03-06-11-27-44