eclipse开启后菜单栏莫名消失

[kaxin]

如题；在前1分钟我打开eclipse配置好eclipseME插件，重启后正常。关闭，修改java字体配置。大约1分钟后再次打开eclipse，菜单栏消失

eclipse菜单栏消失

jdk path:/usr/lib/jvm/java-6-sun
/etc/eclipse/java_home

代码： 全选

# This file determines the search order the Eclipse Platform uses to find a
# compatible JAVA_HOME. This setting may be overridden on a per-user basis by
# altering the JAVA_HOME setting in ~/.eclipse/eclipserc.

#/usr/lib/jvm/java-7-icedtea
/usr/lib/jvm/java-6-sun
/usr/lib/jvm/java-gcj
/usr/lib/kaffe/pthreads
/usr/lib/jvm/java-1.5.0-sun
/usr/lib/j2se/1.5
/usr/lib/j2se/1.4
/usr/lib/j2sdk1.5-ibm
/usr/lib/j2sdk1.4-ibm
/usr/lib/j2sdk1.6-sun
/usr/lib/j2sdk1.5-sun
/usr/lib/j2sdk1.4-sun

[izee]

命令行运行eclipse
看有没有错误输出