Wow that's a lot of memory for mirc... I just looked at my task manager for the heck of it and my mirc (including a script and at least one .dll) is only running 15mb of ram.
You must have something loaded that must be memory hogging...
Someone else suggested a clean mirc with nothing fancy... give it a try and let us know
This happens to me too. I don't use any scripts, my buffer's at 2000 and I don't log anything, but I do visit 9 channels on 5 servers regularly. It locks up even more often when doing anything related to DCC sends, such as browsing for the file to send. This never happened to me before upgrading to 6.12, and still doesn't happen to my other client which runs SysReset and mIRC 6.03. It's really getting frustrating.
no may problem... it does not consume many ram, only hard disk swap file so... it must log buffer in somehere, isn´t it? i have mirc runnig all week long, so..