Distribution validation hangs on App ID

I was trying to submit my app to the App store when the Xcode validation suddenly returned this error:

This bundle is invalid. the application-identifier entitlement is not formatted correctly; it should contain your 10 character App ID seed, followed by a dot, followed by your bundle identifier: XXXXXXXXXX.com.mycompany.*

The generated Entitlements.plist file in the build contains:

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
 
        <key>application-identifier</key>
        <string>XXXXXXXXXX.com.mycompany.myappname</string>
        <key>get-task-allow</key>
        <false/>
        <key>keychain-access-groups</key>
        <array>
            <string>XXXXXXXXXX.com.mycompany.myappname</string>
        </array>
 
    </dict>
</plist>

My provisioning distribution profile also contains the right App ID string (XXXXXXXXXX.com.mycompany.*) and never gave problems in the past.

I submitted my app several times before so this must be either Titanium or Xcode I assume. I'm using: Titanium SDK 2.1.2 GA, Xcode 4.5, IOS6, build for iPhone and iPad.

Do you have any suggestions to solve this? Thanks!