Gustaf,
a javascript error is occurring in file-selector. The fix i made:
in file-selector.adp look for:
opener.document.getElementById("f_title").value = document.getElementById(id + "_file_title").value;
and replace "f_title" with "f_alt" so it looks now:
opener.document.getElementById("f_alt").value = document.getElementById(id + "_file_title").value;
yes, i noted xinha takes a while for displaying the first time but it integrates well into applications. I am using firefox for Gnu/Linux and tried xinha using oacsFS plugin with xowiki, forums and weblogger and it worked well. I will try it with other browsers and see how is the behavior.