a recommended upgrade for everyone, and especially if you have been experiencing crashes in spanningtree during a netburst.
Alot of bugfixes went into this release along with some general optimisations to further improve server performance. 1.1.9 Also introduces a new oper command to spanningtree: /RSQUIT - after this release, using SQUIT to de-link remote servers will be deprecated and removed. This means added security for your oper blocks, since you can now seperate access to SQUIT and RSQUIT.
The filter modules now support flags for more precise target filtering like privmsg, parts, quits and the ability to exempt opers from a filter.
Specific to our native windows build is that it now comes prepackaged with gnutls ssl module as well as the pcre filter module. Further the DNS resolver was fixed, issues with relative config paths and some other minor issues were also fixed.