Compatible with Joomla 1.5?

I was just wondering if the FCKeditor is compatible with Joomla 1.5. Finding a decent editor is hard work and this is my favorite. I would really like to be able to keep it when/if I update to Joomla 1.5. I just want to make sure it will work before I make any major changes. So, does it?

Thanks for a great product.