Real Player "download this video" not working with Dailymotion

Hello,
As of last weekend I have not been able to download any videos from Dailymotion. Real Player is properly configured, and the "Download this video" option shows whenever a video is playing, in many sites, such as Youtube, and including Dailymotion. However, the download works with all the sites I've tried except for Dailymotion - and with the latter it had worked until last week.
When I watch a video in Dailymotion and click on "Download this video", it seems to download it, even showing the progress bar. However, no matter how long the video is, the window indicates a length of 0,3 to 0,6 Mb, the "download" finishes in a couple of seconds, and of course, nothing has really been downloaded.
As far as I know, nothing has changed since last week, when downloading from Dailymotion worked.
Do you have any idea what may be happening?
Thank you very much!