please see my conclusions about linux here http://en.smath.info/forum/yaf_postsm9153_Data-Exchange-plugin.aspx#post9153 smath fails when loading images in linux.
in general my best experience with smath was in distros with mono2.6 and classic gnome2 desktop, centos (or stella which is a centos based distro including not only gnu software) and solusos worked really nice along with smath (sadly solusos was discontinued recently)