It happens to me too running aMule 2.1.3 on Edgy. Actually the problem is presented when you close the last open tab in the search results, which is also triggered when pressing the clear button.
-- amule crashes when I close a tab https://launchpad.net/bugs/59138 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
