I have just upgraded to 1.4.2 using Fantastico - which caused access rights problems noted in other posts - guest users not allowed and any attempt to change configuration did not work. In an effort to resolve this I selected "Restore Factory Defaults" in the configuration mode. Now my User ID and password is no longer recognised so I cannot get into Admin mode. I assume the configuration utility has restored the default ID and password. Does anyone know what these defaults would be?
Don't use Fantastico, it's buggy. Has been asked often, searching (http://forum.coppermine-gallery.net/index.php?action=search2;search=fantastico) would have helped.
Have a look at this thread, I found it really useful.
http://forum.coppermine-gallery.net/index.php?topic=24516.msg113319#msg113319