Bug or not, that is the crucial question...
When I move to 'Search', select the last option from the drop-down menu (there is 'Local', 'Global', 'Kad' and 'Checksum') all I get in the debug log is this:
(process:14130): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Other than that, nothing happens...
My hash was 32 chars in length. But perhaps it needs a different format instead, e. g. ed2k:// prepended to it??
I'm groping in the dark here...