Thanks for writing XChat - it's great. The Linux version of XChat is open source and there is no charge for it - excellent.
But since the Linux binaries are completely free and unencumbered, and the Windows binaries are not, then please warn users of that fact before they download and install the Windows version. At http://www.xchat.org/index.html you should write a warning near the "Download Now" icon.
Thanks in advance.