When I copy something in a Java application (using the IcedTea JVM), I can paste it everywhere just fine. It will not, however, show up in clipman.
the function gtk_clipboard_wait_is_text_available() never returns true, while gtk_clipboard_wait_text() will return the text content. looking forward to change the code.
fixed in git commit 47d25dee3986b2a075831fde9bad70026c82e00d thanks for the report!
http://git.xfce.org/panel-plugins/xfce4-clipman-plugin/commit/?id=47d25dee3986b2a075831fde9bad70026c82e00d
Excellent, thank you!