I'm writing a plugin and I've noticed that when another plugin is installed, specifically Dean's FCKEditor for WordPress, parts of mine break. I'm trying to work with the author of that plugin to find a solution, but there's a chance I might not find one or get a response. In the meantime, I have a solution that can work around it, but it's not very elegant. Thus I'd only like that workaround to show up if and only if the FCKEditor is installed.
Is there some way to access a list of installed plugins, specifically from the context of page/post editor pages, to check if that specific plugin is installed?