Philips DVP3388 - Delay between audio and video

After lots of online reviews, I ended up buying the Philips DVP3388. It sure did justice on its part of displaying damn good clarity when a DVD is played. I tried with the Transformers DVD. I ended up watching the movie twice, just for its clarity (as a digress, I already had watched it about 20 times before the HDMI enhancements). Divx playback was also pretty much clean and decent (I used a 16Gb Corsair pendrive). But, over time, I started noticing a change in the USB playback. The audio and video in the divx playback started to go haywaire. The video was the winner with the audio lagging noticeably. I was seriously confused, because the video playback on a PC was immaculate. I tried lots of things like reducing the total data content in the pendrive, tried playing smaller sized divx files, even tried playing older files which previously worked just fine. Suddenly one day, a flash occured, and I ended checking the fragmentation. The pen drive was fragmented (but not very badly though). So, just to try out, I defragged it. Voila, everything played perfectly on the player now. I dont know if this same issue occurs with other players (I remember no one mentioning about this issue anywhere), but this sure is an issue with DVP3388.