arte.tv gives invalid URL for some URLs

[grexe]

I'm back unfort. with another issue - for some shows, the arte plugin still fails, but this time with the good old "invalid URL" error:

[grexe@grexbox arte]$ youtube-dl -t --verbose "http://liveweb.arte.tv/de/video/Lang_Lang_Dee_Dee_Bridgewater_Radio-Sinfonieorchester_Stuttgart/"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-t', '--verbose', 'http://liveweb.arte.tv/de/video/Lang_Lang_Dee_Dee_Bridgewater_Radio-Sinfonieorchester_Stuttgart/']
[debug] youtube-dl version 2013.07.08.1
[debug] Python version 2.7.3 - Linux-3.9.2-1-CHAKRA-x86_64-with-chakra
[debug] Proxy map: {}
[redirect] Following redirect to http://liveweb.arte.tv/front.do;jsessionid=9047FCED6097F0C17383CB9098715D88.tc6l2?method=getHome
WARNING: Falling back on generic information extractor.
[generic] front.do;jsessionid=9047FCED6097F0C17383CB9098715D88.tc6l2?method=getHome: Downloading webpage
[generic] front.do;jsessionid=9047FCED6097F0C17383CB9098715D88.tc6l2?method=getHome: Extracting information
ERROR: Invalid URL: http://liveweb.arte.tv/front.do;jsessionid=9047FCED6097F0C17383CB9098715D88.tc6l2?method=getHome; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 312, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 95, in extract
    return self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 125, in _real_extract
    raise ExtractorError(u'Invalid URL: %s' % url)
ExtractorError: Invalid URL: http://liveweb.arte.tv/front.do;jsessionid=9047FCED6097F0C17383CB9098715D88.tc6l2?method=getHome; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output.

[phihag]

This (liveweb.) seems to be third (!), unrelated video delivery method of Arte. It uses RTMP instead of HTTP like the two others.