So, if this something that changed or was it always the case (i.e. 2 years ago). i.e. I'm sure this *used* to work.
I'm wondering if any of the URLs or anything else in the web service environment changed.
Also, this post speaks about changes in Flash Player pertaining to forward slashes:
Well that is entirely possible, and my current task is to adapt it for a new url scheme for one of the apis.
There are anecdotal reports that something was updated and then it stopped working some time ago. It could have been the flash player that was updated.
Anyway, I shall get the appropriate files sorted out and hopefully I can start PUTing etc.
These articles discuss security changes between FP 9 and 10:
What is impacted?
This change can potentially affect any SWF file accessing cross-domain content. This change affects SWF files of all versions played in Flash Player 10 and later. This change affects all non-app content in Adobe AIR (however, AIR app content itself is unaffected).
What do I need to do?
Read the article: http://www.adobe.com/devnet/flashplayer/articles/fplayer9_security.html