Netflix streaming in SD quality?

Network Information : 55 Mbps Download, 2 Mbps Upload

Available Speeds (as of now) : 54.97 Mbps Download

Netflix has been known to automatically detect network bandwidth, but lately, it has been doing a horrible job at doing so.

I'm attempting to stream an HD movie through the Netflix PS3 client, and the quality is averaging Low / SD quality, rather than the usually expected Extra High / HD.

I'm able to stream the same movie on the PC in HD quality.

The PS3 is wired in to the modem directly, and, for whatever reason, has an average download speed of 5 Mbps. (network test) This has to be an issue with the PS3 itself, or possibly the Netflix client, and not my internet or network.

However, the internet connection test has always shown a 5 Mbps download speed average on the PS3, so I assumed it was a limitation with the network card. Even so, I've never encountered any such problems with Netflix before, so, honestly, I'm clueless as to what the problem truly is, let alone how to fix it.

Can anyone provide me with any kind of help, tips or even troubleshooting information?

I'm always able to stream on my PC or my Xbox, but I have the wireless 7.1 headphones that are exclusive to the PS3, so I'd rather not stream on any other platform.

Thanks.