When I have unity web player partially installed and it fetches the rest through the autodownload I get the wrong engine version. It would seem that when the autodownload is fetched from a secure page it gets engine version “3.5.0f5” and when it is fetched through a non-secure page it gets version “3.5.1f2”.
Below are the two different links to the autodownload files, would appreciate if someone could try them out and see what version you get. The version is displayed inside the info.plist file in the zip.
Secure:
https://ssl-webplayer.unity3d.com/autodownload_webplugin-3.x/UnityPlayer3.x.x-win32.zip
Non-secure: http://webplayer.unity3d.com/autodownload_webplugin-3.x/UnityPlayer3.x.x-win32.zip