DLNA is not the standardized protocol that everyone would like to believe. Some files work on one unit and may not work on another. From what I've seen TV's are the most fragmented when it comes to what they support. The best DLNA player I have seen and used is the PS3. It plays all the files that our NAS devices support. Tv's so far seem to be the worst because they either just don't support that many files or their DLNA clients are flakey.
Here is an example of the fragmentation that I'm talking about. I own the LS-WVL unit along with a Ps3 slim and a Sony Blu ray player. I've always never had a problem with playing files on my Ps3. Sometimes I'll get random DLNA issue but It's always pointed to the Ps3 being the issue. Usually just exiting from the LinkStation Media server and going back into it fixes it. But either way its been the best I've used. Then my family purchased a $600 Blu ray player that had DLNA and surround sound. Since it was from Sony I figured that it would be as robust as the Ps3 when it came to the DLNA client... I couldn't have been more wrong. The Blu Ray player only plays MPEG 2. I have to convert files to see them from my LinkStation. I could also use a Ps3 media server on my Pc to see all my files... But only because they were converted on the fly to MPEG-2.
The best thing to do when it comes to issues with DLNA is to check up on both the DLNA server and the DLNA clients capabilities before purchased.
Here is my setup.
I have a WZR-HP-G300NH connect to my LinkStation and my PC that is slave to a WZR-HP-G450H. My Ps3 connects wirelessly to my WZR-HP-G300NH. All of my devices are running the latest firmware.
I can stream these video files to my Ps3... MPEG-2, MP4, AVI, WMV, and DivX.
I can stream these audio files to my Ps3... Mp3, M4a, WMA
I know I cannot stream MKV, ISO and FLAC
When I transfer files to my Ps3 I put them in a movie folder. They are instantly available on my Ps3. How I do this is I go to the Video's section, go to the LinkStation and choose view by folders and then dig down by the folder specifically. I do not view be artist, or category, or view all or anything else like that. When you choose that option the Ps3 has to build it's database. This may be the same thing with other DLNA clients. If your client has the option to view by folder you need to use it. I have the same issue on the Blu Ray player.
Before you purchase a DLNA sever or DLNA client you need to check the compatibility between the devices, specifically which file formats these devices will support.
I hope that this helps you guys out. I just got a hold of an LS-CHL so I'm going to test that out tomorrow to see how some stuff reacts on that unit and I will post back the results to see if there is any issue with this unit specifically.