Massive 404 Error in Logs

Hello,

I also have problem with validating my podcast feeds. My last problem with the feeds was fixed with the 2.3.0 release. My feeds were validating for a short period of time. After publishing a new episode some minutes ago I get these error messages in the log:

[2015-10-02 02:39:38] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/MPEG-4 AAC Audio
[2015-10-02 02:39:38] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/MPEG-4 AAC Audio HTTP Status: 404
[2015-10-02 02:39:38] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/MPEG-4 AAC Audio
[2015-10-02 02:39:38] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/MPEG-4 AAC Audio HTTP Status: 404
[2015-10-02 02:39:38] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/MP3 Audio
[2015-10-02 02:39:38] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/MP3 Audio HTTP Status: 404
[2015-10-02 02:39:38] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/MP3 Audio
[2015-10-02 02:39:38] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/MP3 Audio HTTP Status: 404
[2015-10-02 02:39:38] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/Ogg Vorbis Audio
[2015-10-02 02:39:38] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/Ogg Vorbis Audio HTTP Status: 404
[2015-10-02 02:39:38] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/Ogg Vorbis Audio
[2015-10-02 02:39:38] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/Ogg Vorbis Audio HTTP Status: 404
[2015-10-02 02:39:39] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/Opus Audio
[2015-10-02 02:39:39] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/Opus Audio HTTP Status: 404
[2015-10-02 02:39:40] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/Opus Audio
[2015-10-02 02:39:41] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/Opus Audio HTTP Status: 404
[2015-10-02 02:39:41] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/Podlove Simple Chapters
[2015-10-02 02:39:41] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/Podlove Simple Chapters HTTP Status: 404
[2015-10-02 02:39:42] Curl Error: The requested URL returned error: 404	ta015-oeffentliche-sitzung-am-01-10-2015/Podlove Simple Chapters
[2015-10-02 02:39:42] Unexpected http response when trying to access remote media file.	ta015-oeffentliche-sitzung-am-01-10-2015/Podlove Simple Chapters HTTP Status: 404
[2015-10-02 02:44:21] Change of media file content length detected.	ta015-oeffentliche-sitzung-am-01-10-2015/MPEG-4 AAC Audio
[2015-10-02 02:44:21] Media file mime type does not match expected asset mime type.	ta015-oeffentliche-sitzung-am-01-10-2015/MPEG-4 AAC Audio Expected: audio/mp4, but found: audio/x-m4a
[2015-10-02 02:44:23] Change of media file content length detected.	ta015-oeffentliche-sitzung-am-01-10-2015/MP3 Audio
[2015-10-02 02:44:23] Change of media file content length detected.	ta015-oeffentliche-sitzung-am-01-10-2015/Ogg Vorbis Audio
[2015-10-02 02:44:24] Change of media file content length detected.	ta015-oeffentliche-sitzung-am-01-10-2015/Opus Audio
[2015-10-02 02:44:24] Media file mime type does not match expected asset mime type.	ta015-oeffentliche-sitzung-am-01-10-2015/Opus Audio Expected: audio/ogg;codecs=opus, but found: application/octet-stream
[2015-10-02 02:44:25] Change of media file content length detected.	ta015-oeffentliche-sitzung-am-01-10-2015/Podlove Simple Chapters
[2015-10-02 02:44:25] Media file mime type does not match expected asset mime type.	ta015-oeffentliche-sitzung-am-01-10-2015/Podlove Simple Chapters Expected: application/xml, but found: application/octet-stream
[2015-10-02 02:54:56] Begin scheduled asset validation.
[2015-10-02 02:54:56] Validate episode	TA015 – Öffentliche Sitzung am 01.10.2015
[2015-10-02 02:54:56] End scheduled asset validation.
[2015-10-02 02:55:29] Curl error
[2015-10-02 02:55:29] Curl error
[2015-10-02 02:55:30] Curl error
[2015-10-02 02:55:31] Curl error
[2015-10-02 02:55:31] Curl error
[2015-10-02 02:55:31] Curl error 

I’m talking about his podcast btw: Technische Aufklärung.

Any idea how to fix this? Thank you in advance!