I thought it would be a good thing to provide some info for the fixes, changes or improvements of new patches because there are no release notes coming with the updates.
Here some earlier info copied over from the Steam forum about RRU:http://forums.steampowered.com/forums/forumdisplay.php?f=1374
Some big improvements for the multiplayer stability, especially in combination with, RED(http://en.wikipedia.org/wiki/Random_early_detection
) or similar routers. Which are around 20% of all routes according to stats.
The other major fix is for the particle stuttering.
There's a friend match bug in this version. There's a very likely crash when you add a city, especially if there's more players than 4. We will release another patch very soon to fix the issue.
The editor saving have been fixed
The overblooming on some systems have been fixed.
UnPNP have been disabled, a possible fix for crashing during connect
A couple of mulitplayer fixes. We know of a few more bugs, but fixes for those didn't make it to this patch.