I cannot get my app to run on a 4.3 simulator, I get the following run-time error :- dyld: Library not loaded: /System/Library/Frameworks/Twitter.framework/Twitter Referenced from: /Users/mymac/Library/Application Support/iPhone Simulator/4.3.2/Applications/xxxxxxxxxxxxxxx/test.app/test Reason: image not found It works on ios higher than 4.3 and I am not using twitter, which suggests it isn't my code (for once!). Any ideas anyone?

There is a plugin In your package that is using twitter, remove it.

Thanks @Kittsy It looks that way, but I don't have any twitter plugings or even use twitter & I have never knowingly added any twitter related plug-ins. The only 3rd party plugin I'm using here is the circle menu. I rebuilt the app using a different menu plugin. No change. If I use 5.0 simulator, or my 5.1.1 device (a 3GS), the app works. My suspicion is that it is either a)a core BT 2.0 problem, or b) that I have a plug-in in my control panel that doesn't like 4.3. Problem is, not being great at xCode, I don't know where to look! Alan

go to your targets then linked frameworks, set twitter.framework to optional or delete it if you are never going to integrate twitter This happens now because buzztouch automatically adds the twitter framework automatically, this error will also disappear if you set your device deploymemt target to ios 5.0 or higher

Thanks @Kittsy, that helped - I don't think I would have sussed this so easily without your input. I made the change top optional as suggested, then tried again. It crashed again, but the error had moved to the mapkit framework, so I made that both optional as well and hey presto, everything works (including googlemaps)! Now noticed the circle menu is more straight than so circular on IOS 4.3, but at least it works! Cheers, Alan

Yeah, no probs. the reasons why them errors are coming up is that you are building for 2 year old plus iOS. I personally would set by base targeting sdk as iOS 5. I read a few articles 95%+ of iOS users run iOS5 or higher. If the circleview menu ain't working this means that a framework that is accessing isn't compatible with ios4, for the 3d rendering

I try to aim for maximum backwards compatibility, but if I'm only catering for 5%, then it probably isn't worth it. Thanks again @Kittsy, much appreciated.