Works fine for me.

Does the crash happen when you are downloading or when you try to open up the files? If it's the latter, you could always try going direct to the folder where they are stored - which in my case, with Windows XP is My Computer/Shared Documents/My Deliveries/iplayer_live, and opening them with some other program, such as Windows Media Player, instead of relying on the built-in BBC iPlayer program, and see if that does the job better.

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Has anyone set up anything to allow them to watch these video files stored on the PC upstairs on the TV downstairs, using a wireless link?