There is a problem with the logging feature when trying to support multiple networks. The client just dumps them all into one folder (main), instead of dispersing them where they belong like 6.03 did!
Hoped it was fix in the version that also fix the dcc exploit.. Sucks bigtime.. Now i have to ignore all dcc until a new vesion get out and with the normal speed that means 1-2 months.. I wont use a version that can handle logs .. arg lameness
and have you tried v6.12 ?
I've seen this happen with 6.12 as well, so it seems to be an issue with the 6.1x series, however, mine only occurs after I've copied a script into the mIRC directory, and haven't actually run the mIRC.exe before doing so.
The simple solution for me is to make a logs directory in my script.
However, I personally think that the setup program for mIRC should create all the folders instead of relying on mIRC.exe to create them.