Same here, it completely messed up my files
Here's how it's reproduced:
- Alt+O - [+] IRC - Logging: [x] Include network and [x] Create folder.
/server my.irc.network
/join #chan
/log on
* Logging #chan to logs\network\#chan.log
/log off
* Logging for #chan halted
/log on
* Logging #chan to logs\#chan.network.log