After changing http management port in host.xml console stops working.
Changing it back to default 9990 fixes the issue.
It seems it s GWT related and 9990 port is "hardcoded" in java script files.
Every script named 32.cache.js in modules\org\jboss\com\sun\httpserver\main\jboss-as-console-1.0.0.Beta13-resources.jar has some variable set to ':9990/'. (only one occurrence in a file)
After changing its value to match a new http management port in host.xml (other than 9990) and repackaging of jboss-as-console-1.0.0.Beta13-resources.jar console starts working again.
Note! Checked only on domain mode. Not testes in standalone.