After playing more than 2hrs the engine of the CDJ2000Nxs gets suddenly really slow. I tried and tested it with the use of (RB Prepared) USB sticks & SD cards (Both formatted in FAT32 & Macintosh Journaled). It always happens with me. I've asked some collegues and they experience the same problem and it only happens on the nexusses. Not on the MK1's.
The problem only goes away when you restart the players or have all USB's and sd's removed. My guess is that it is some kind of memory that is filling up... It's a real problem. When I use my lacie Fastkey normally the "search" happens within a few seconds (6000tracks). After the slowness coming up it was going to up to 30/40 seconds before the search results pops up. Scrolling thru playlists also was becoming a real problem...