"Leopard Admin" is a plugin that skins the administration panel of the popular blogging platform, WordPress.
No, the plugin is completely safe and simply overlays a CSS file on top of the default WordPress administration style. If you prefer the default, simply deactivate the plugin.
No. The plugin will automatically detect if you're using IE and will not override the style. The plugin is compatible with all other modern browsers such as Firefox and Safari.
I have no plans to but if there's enough demand, I'll work on a version that will make the plugin compatible with IE 7.