I'm experiencing exactly the same issue reported in this thread. I have ripped my DVD collection to a directory on my Linkstatiion (running FW 1.56). The directory (share/media/Movies2) contains 100+ files but when viewed on a DLNA player I only see 18 of them
I have 3 DLNA players (A sony blu-ray player, a sony TV and the MediaConnect iPhone app) - each of them shows this same subset so I'm confident it's the Linkstation server that's imposing the limitation. The files were all created using the same tool with the same settings.
I have tried re-installing the firmware and changing the directory name (hence the directory is now Movies2 not Movies) and I still only see a small number of the files. I've looked for a pattern between the chosen files that do manage to appear on the DLNA players but there'e nothing obvious (all the same type, a mixture of sizes, same permissions).
I have attached some screenshots so that you can see the files in that directory as mounted on my laptop and how only a small number of these files appear on the DLNA player.
Are there any other possible workarounds or suggestions how this can be debuggeed further?