Would a wired connection help?

I just picked up my SMP on weds and I really love this box…I bought it to compliment my Live HUB and they are working great together!  

As it has been noted, there are some issues with certain 1080p movies…I’m wondering if this is an issue with the MKV file or is it a bandwidth issue.  So if its related to bandwidth would a wired connection be a better solution for the SMP?

Using a wire connection for streaming for HD movies is always better.