Pcman crash on Ubuntu 12.04 - Linux

將ubuntu升級成12.04後, 發現pcmanx無法登入, 一登入就crash
以下是gdb pcmanx的資訊, 請問看出甚麼原因嗎?

Reading symbols from /usr/bin/pcmanx...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/pcmanx
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee873700 (LWP 11492)]
[New Thread 0x7fffee072700 (LWP 11493)]
[New Thread 0x7fffe6a85700 (LWP 11494)]
[New Thread 0x7fffdb662700 (LWP 11497)]
[Thread 0x7fffdb662700 (LWP 11497) exited]
[Thread 0x7fffe6a85700 (LWP 11494) exited]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6bc7bd0 in XftCharExists ()
from /usr/lib/x86_64-linux-gnu/libXft.so.2
(gdb)

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