Cookie Monster, you seriously expect that a virus would TELL you where it came from honestly?
Most malware of any kind hides itself.
Tell me full details of your PC, OS, where the "virus" was exactly and the relveant filenames, which virusscanner you use, and so forth.
As to anyone else, I doubt that the Java-based IRC client we have on the website contains anything malevolent. We can check, of course, since Peanut and Jos added it.
Let's consider the rest of the IRC process, too...
Well, I have been using this IRC server for a year. I know who it's admins are, and I trust them. And I don't think there's any way they could give you a virus, since you connect to them with a very limited IRC client.
The other possible way is to accept a file send from someone else. Firstly, if you ever get a virus that way, there is NOBODY to blame but yourself - you chose to accept it; you take the consequences. Secondly, none of the regulars on that server would do that - I know them - and it's such a small server that anyone targeting it would be wasting their time. Thirdly, as far as I know, the Java client can not receive files in this way at all - it is a very primitive client, as I said.
Anyone who is using Internet Explorer regularly for web browsing will get viruses and malware almost certainly. Even with high security settings. It's HIGHLY recommended by everybody except Microsoft themselves (and anyone they pay) that at the very MINIMUM you use the highest possible security settings on IE along with a well-configured firewall. And no, the firewall included in Windows XP does not count. To minimise the risk, it is recommended that you run an alternative web browser that is 1. Less popular with crackers and "script kiddies", and 2. Less full of security flaws. Opera, Mozilla, or Firefox are three recommended browsers.
The only current reason to use Internet Explorer at all is to update your copy of Windows regularly.
If you accept files, run downloaded programs, or open email attachments without being sure what they are and without virusscanning them with a trusted, effective virusscanner (I personally recomend AVG from Grisoft), then you may give yourself a virus. And that would be entirely your fault.
If anyone does not trust the Java IRC client, by the way, I recommend either installing a standalone IRC client (mIRV, XChat, whatever...) or a combined IM program with IRC features (Gaim, Trillian), or using a CGI interface. And, lo and behold, this IRC server we use actually has it's own CGI web-based interface. A CGI IRC client does not run on your computer at all. It's run on the server, unlike the Java client we use, and it sends the information to your web browser. The server we use has a CGI client available at
http://www.tauniverse.com (just click on IRC and look for the appropriate instructions.)