1. Launch keyboard Behavior (launch--> preference--> desktop preference--> keyboard--> behavior
2. Switch to Layout tab.
3. Add some available layouts (unable to add more than four layouts)and remove all the layouts available.

Observation and bug:

The following error comesup,

Error activating XKB configuration.
Probably internal libxklavier or gnome-settings-daemon problem.

X server version data:
The X.Org Foundation, Inc
60802000

If you report this situation as a bug, please include:
- The result of xprop -root | grep XKB
- The result of gconftool-2 -R /desktop/gnome/peripherals/keyboard/xkb


Output of the commands:

xprop -root | grep XKB
_XKB_RULES_NAMES_BACKUP(STRING) = "xfree86", "pc104", "us", "", ""
_XKB_RULES_NAMES(STRING) = "xfree86", "pc104", "us", "", ""

gconftool-2 -R /desktop/gnome/peripherals/keyboard/xkb
 layouts = []
 model = pc104
 overrideSettings = false
 options = []

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The Remove button is enabled if user selects a layout in "Selected Layout" tab. But it is actually not possible to delete all layouts and have no layout selected at a time.

In addition to above condition, the Remove button should only be enabled if the number of layouts in "Selected Layout" tab is greater than 1.