If you are having issues with the Flash Player, there is a forum dedicated to it that would be a more suitable place for discussions about it...
It is not just a "flash player" Issue. It is a combination of Google Chrome/Flash & possibly something on Zynga/CityVille's end.
Mine crashes & shows as a "Data Execution Prevention (DEP)" problem.
The Flash player is currently working correctly with all other Zynga Games.
I have followed all the directions to correct the DEP, but do not have any executable files for CityVille on my PC.
I am unable to find anything about it on Google Chrome's end as having a problem.
CityVille/Zynga have no mention of a problem anywhere.
I guess we are just looking for answers anywhere.
Flash player also crashes whenever I try to play any Zynga game regardless of what browser I use. I usually use Chrome, but have tried firefox, IE7, 8, &9, Avant, and Safari. I am a big proponent of keeping the computer up to date (all programs) and removing any program that is either out of date or no longer being used. I go into all kinds of different sites, and play games on different sites as well as other games on facebook and so far, only the games that Zynga 'makes' crashes flash player.