Differences between HDRW720/17 and /17b?

Hi all,

I was on the Philips support site today and was looking to see if by some miracle they’ve released a firmware patch that will fix the “Guide” lock-up problem.

When I entered HDRW720/17 in the model number field to search for I was then prompted to choose between the 720/17 and 720/17b … I know that option never used to be there.

What are the differences between the two and how do I know which one I have?

I’m sure I’ve got the regular /17 because that option is new, but I’d like to check to be sure.

Here’s the link: