TERRIO  Interesting; at the time I posted this, it still claimed to run on 10.3.9. Oh well.  
(Version 2.2.1(4132))

TERRIO  Won't start up on 10.3.9 -- crash log reads:

dyld: /Users/xxxx/Downloads/Colloquy.app/Contents/MacOS/Colloquy Undefined symbols:

ChatCore undefined reference to _NSBaseURLDocumentOption expected to be defined in AppKit

ChatCore undefined reference to _NSCharacterEncodingDocumentOption expected to be defined in AppKit

ChatCore undefined reference to _kCFStreamPropertySSLSettings expected to be defined in CoreServices

ChatCore undefined reference to _kCFStreamSSLAllowsAnyRoot expected to be defined in CoreServices

ChatCore undefined reference to _kCFStreamSSLValidatesCertificateChain expected to be defined in CoreServices

Acid undefined reference to _kCFStreamPropertySSLSettings expected to be defined in CoreServices

Acid undefined reference to _kCFStreamSSLAllowsAnyRoot expected to be defined in CoreServices  
(Version 2.2.1(4132))