My suggestion: Screenshot it, catch the debug file and post it on the "FE Support", there is a better chance it will be noticed by the support team 
. That said sounds very mystic, I have not experienced this myself, hope you get it fixed since its a shame if some parts of the game wont work for some people 
The Debug file can be found at "Documents/My Games/Fallen Enchantress" and specific name is "debug.err"
To post a screenshot directly on the forum you will need to upload it to a different site, like imageshack, and then include it by clicking the little green tree icon.
2 helpers just in case you need to know 
Sincerely
~ Kongdej
