Created attachment 5081 Error Report From ABRT Xfdesktop causes crash report in ABRT (Automatic Bug Reporting Tool) but can't be reported according to it. See attachment. I am using Xfce 4.19.0 on Fedora 18 without any major problems.
Can you disable the ABRT and enable core dumps so we can get a stack trace to debug the issue?
This happened over a year ago. It is unreasonable to expect the user to generate any information about this without going back in history. And my time machine is broken.
Sorry I'm too late to help, closing bug report.