there is a critical mirc bug in all versions except 6.12
Upgrade or disable dcc before someone crashes u

see : http://www.securiteam.com/windowsntfocus/6...6I00C158KM.html for advisory
see : http://www.securiteam.com/exploits/6J00D158KO.html for exploit
Also there is an irc:// handling bug

see : http://www.securiteam.com/windowsntfocus/6...6M00B0U8KE.html

Just take care , maybe one of these bugs would evolve to run commands on your system !

source: source-warp2search

mIRC v6.12 has been released to address a remote vulnerability found yesterday, capable of crashing your mIRC. The vulnerability affects versions of mIRC from v6.0 onwards, so it is highly recommended that you upgrade to mIRC v6.12:

Update: Thanks to Mr A looks like we've found a fresh bug in mIRC v6.12 ... Read More

well it's me another time... just installing 6.12 i found a big bug in mirc 6.12

it sems that making a whois to some user with lots of channels like some bots.. make a buffer overflow .. this can be explotable easy.

mIRC.com or mIRC.co.uk

mIRC is for L-USERS!

ircII ownz all

ohh woow coder..
i bow to u...
ircII is for ppl with lnx the best client and mirc for ppl with win
i got alot windows pcs and alot lnx pcs...
so i use both ..
now i'm a lewser OH NOOOO *cRy*

Take a look here to fix it.