据说安装compiz icon 能缓解窗口边框的问题。但是我装了运行看不到任何窗口。甚讶。以为是system tray不让进去，修改了还是不行。才想起来去terminal下看到有报错：

fusion-icon
* Detected Session: gnome
* Searching for installed applications...
Checking if settings need to be migrated ...no
Checking if internal files need to be migrated ...no
Backend : gconf
Integration : true
Profile : unity
Initializing decor options...done
* Intel detected, exporting: INTEL_BATCH=1
* Using the GTK Interface
* Decorator "/usr/bin/compiz-decorator" is invalid.
* Setting decorator to GTK Window Decorator ("gtk-window-decorator --replace")
* Starting Compiz
... executing: compiz --replace --sm-disable --ignore-desktop-hints ccp
compiz (core) - Warn: Unknown option '--ignore-desktop-hints'

Checking if settings need to be migrated ...no
Checking if internal files need to be migrated ...no
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Skipping upgrade com.canonical.unity.unity.01.upgrade
Skipping upgrade com.canonical.unity.unity.02.upgrade
Initializing core options...done
Initializing bailer options...done
Initializing detection options...done
Initializing composite options...done
Initializing opengl options...done
Initializing decor options...done
Initializing mousepoll options...done
Initializing vpswitch options...done
Initializing animation options...done
Initializing snap options...done
compiz (expo) - Warn: failed to bind image to texture
Initializing expo options...done
Initializing move options...done
Initializing place options...done
Initializing grid options...done
Initializing gnomecompat options...done
Initializing wall options...done
Initializing ezoom options...done
Initializing workarounds options...done
Initializing resize options...done
Initializing fade options...done
Initializing unitymtgrabhandles options...done
Initializing scale options...done
Initializing session options...done

Screen geometry changed:
0x0x1366x768

Initializing unityshell options...done
DEBUG 2012-03-07 20:48:35 glib <unknown>:0 Setting to primary screen rect: x=0 y=0 w=1366 h=768
Setting Update "command"
Setting Update "main_menu_key"
Setting Update "run_key"
compiz (core) - Warn: failed to receive ConfigureNotify event on 0x3c000e9

compiz (core) - Warn: failed to receive ConfigureNotify event on 0x340029f