Many of the newer desktop user interfaces display icons at sizes larger than 48px. GNOME 3 will do this by default. It would be great for X-Chat to look pretty in these environments. A 256px icon would do the trick.
The very talented Jakub Steiner and Lapo Calamandrei put together a new icon with hires and lower res versions. I can give you a build system patch to put these in the right places for the system to find them.
Love to know what you think. Thanks!