Current issues are in the FAQ for the README, the older FAQ items have been moved below.
Q. How do I upgrade my older project to the current version?
A. Guidelines here
Q. When I run the Installer, the installation fails?
A. Follow the instructions here
Q. Links to and imported files from external hosts don't load?
A. The latest code has the new white-list feature. If you are referencing external hosts, you will have to add the host in PhoneGap.plist under the "ExternalHosts" key. Wildcards are ok. So if you are connecting to "http://phonegap.com", you have to add "phonegap.com" to the list (or use the wildcard "*.phonegap.com" which will match subdomains as well). (Note: If you open the plist file in Xcode, you won't need to fiddle with the XML syntax.)
Q. In Xcode 4, I get the compile-time error "Undefined symbols for architecture armv6: _CMTimeGetSeconds"?
A. Add CoreMedia.framework to your project. This error would only occur for pre-0.9.6 created projects. New projects should have this framework added automatically through the template.
Q. I have a compile error 'NSEC_PER_MSEC undeclared'?
A. You are probably using Xcode 3.2.5, please upgrade to at least 3.2.6.
Q. Can I do AJAX with servers that have self-signed certificates?
A. No, this is a iOS SDK limitation with UIWebview. You'll have to write an Objective-C plugin.
Q. With iOS 4 SDK, I get "Base SDK Missing" error?
A. See "Upgrade Your Xcode Template for iOS 4"
Q. I installed Xcode 4, but I don't see the PhoneGap template when creating a New Project? Where is it?
A. Xcode 4 Templates are included as of PhoneGap version 0.9.5.1 - download here.
Q. PhoneGapLib.xcodeproj is red in my PhoneGap-based application and I get build errors?
A. The Xcode variable for PhoneGapLib is not set. Xcode must be closed when the installer is running. Either run the installer again, or add a PHONEGAPLIB variable in Xcode Preferences --> Source Trees, with the location of PhoneGapLib. The installer would have installed it in ~/Documents/PhoneGapLib.
Q. What is this warning I get when I am packaging the installer? "Warning: "Require Admin Authorization" is recommended but not enabled. Installation may fail."
A. You can safely ignore this warning, it will not affect installation. The installer only installs for the current user, thus it does not need Admin privileges.
Q. I get this "Invalid architecture" error. How do I fix it?
A. The Active SDK for the project is set to "Use Base SDK", change it to one of the iPhone targets in the drop-down. Unfortunately this is a user-specific project setting and cannot be set in the Xcode template.
Q. I get this "_kUTTypeImage" link error. How do I fix it?
A. This relates to framework added for the new UIImagePickerController delegate. Add "MobileCoreServices.framework" to your project. This only relates to pre-existing projects that have updated their PhoneGapLib. New projects should not see this error.
Q. I have Framework errors in red when creating a PhoneGap project in Xcode 3.2.x for iOS 4.x? How do I fix it?
A. Change your Base SDK. Go to the Project Menu --> Edit Project Settings --> General Tab --> Base SDK for all Configurations. Change it to "Latest iOS"
Q. I still have some "Invalid Architecture" errors. Yes, I've looked at the items above. How do I fix this?
A. The Base SDK for your project and PhoneGapLib must be exactly the same. Launch PhoneGapLib.xcodeproj (double-click on it in your project), and set its Base SDK to the same one in your project.
Q. I've tried almost everything and Xcode fails to compile PhoneGapDelegate.m in PhoneGapLib.
A. Check whether there is a space in the path to PhoneGapLib, particularly if there's a space in your home folder name. Unfortunately at this time you either have to change your home folder name (since PhoneGapLib is installed under it, in your Documents folder) or relocate PhoneGapLib to a location that has no space in the path (and make sure you update the PHONEGAPLIB Xcode variable in Xcode Preferences --> Source Trees). This has been fixed in the latest codebase as of Mar 7th 2011.