There is an issue when you use the automatic update feature. It creates an erroneous folder that contains the actual plugin folder. For the time being, please refrain from using the automatic upgrade. If you have already upgraded via the automatic method and the plugin disappeared from your plugins list, just ftp to your WP install, go into the plugin directory, and move the ‘tag_cloud’ directory from the ‘configurable-tag-cloud-widget’ directory to the main plugins directory. After you do this, you can activate the plugin as normal.
Sorry for the issues…I’m trying to find a fix, and will post agian when I figure it out.