So I'm guessing that this may not be supported by the Allshare software, but I'd like to look into the cause. Could you please E-Mail, using the community email feature here on my profile: http://www.cnet.com/profile/Samsung_HD_Tech/
Include the summary you gave here. Mention what model of TV you're using and what brand of laptop and even what wireless router you're using. Also, definitely include what the videos you're attempting to watch were and where you obtain them along with their format information.
There's an laguage option for subtitle. But this Blu Ray show only broken characters. Is there any way to fix it.
FYI, that caption works OK on the computer.