The startup theme...

[Animeniac]

I installed the KDE in my Ubuntu computer. Everytime I start the computer with Ubuntu, I get the Kubuntu startup/shutdown theme (NOT in the login screen). Also the theme of the GRUB boot menu has changed into the Kubuntu theme that has a dark highlight bar, and the background color is black.

How can I change the startup/shutdown theme from Kubuntu back to Ubuntu?
And how can I change the theme of the GRUB boot menu?

[ajgreeny]

If you mean the usplash screen, normally the enlarging orange bar with the word ubuntu above, you can get it back by using command

sudo update-alternatives --config usplash-artwork.so

in terminal and choosing which one you want. Interestingly whenever I used it it didn't change both the startup and shutdown but just one (can't remember which) so I got the one back that I wanted by uninstalling the other one with synaptic. Do a search for usplash if you want to do the same to get you ubuntu usplash back.

About the grub part, I can't help as I thought the two systems were the same, just showing a simple menu on black background unless you changed it yourself. I didn't think there was a grub theme at all in either. For some possibly useful info look at the txt file attached.

[pi.boy.travis]

You can change upsplash themes with Startup-Manager. Install it via synaptic. It will be in System-Administration. Additional themes can also be installed via synaptic.

[Animeniac]

The Startup manager really helped. Not only can I change the usplash theme, but I can also change the text and background colors. Thanks for your help, guys.

[pi.boy.travis]

It comes in real handy. BTW if you ever have to edit menu.lst try QGRUBEditor. Also really easy to use.