dmesg | grep xfce4-panel [ 3162.072822] xfce4-panel[3401]: segfault at 48 ip 427273a2 sp bf93f0e0 error 4 in libICE.so.6.3.0[42720000+15000] [ 5021.563389] xfce4-panel[10842]: segfault at 0 ip b7eb6ce7 sp bfcf2bb0 error 4 in liblauncher.so[b7eb1000+c000] [ 5099.766172] xfce4-panel[11840]: segfault at 1c ip 4ffacd18 sp bfe278d0 error 4 in libxfcegui4.so.4.3.0[4ff75000+49000]
Please upgrade to Xfce 4.6.1 and provide good backtraces using gdb. This information does not make any sense.