Hi,

In past Ubuntu editions I remember that gnome-appearance-properties did work like a charm. As soon as one did change the color it had immediate effect in all applications, selected items and window borders. Fast and stable. Reliable.

But in 8.04 it does not work so well, regarding that it is not so fast and also it does not change the color of the window borders, even if one closes and starts again the different windows. Also, the color for the selection of text within a window (in Firefox or in Gedit, as 2 examples), it also does not change to the new color.

I've found out that for the new color to be reflected in the windows border one has to close and re-start the gnome-appearance-properties application and even to change the window border theme (it does not work to close and start other windows or applications).

Then, for the new color to be in the selected texts, one has also to close and re-start the respective applications.

And not always the colors change even when re-starting gnome-appearance-properties or even re-starting the PC... It simply resist the colors to be changed.

As well, I tried to start gnome-appearance-properties from the terminal as sudo but I get an error message. 

The error says that: "It cannot be started manager configuration "gnome-settings-daemon". If the agent of configuration of GNOME is not being executed, it is possible that some of the preferences won't work. This can be the symptom of a problem with Bonobo or that an agent of configuration that is not of GNOME (for example KDE) already is active and in conflict with the agent of configuration of GNOME."

As per LinuxMint says, at http://www.linuxmint.com/rel_elyssa.php#knownIssues
it is because:
"The color of the window borders doesn't always refresh when you select or customize a Gnome theme. This is because some GTK themes refer to the same Metacity theme but with different colors, and unless the metacity theme itself is changed Gnome doesn't refresh it."