Android Market says app incompatible with SG2

Are there any known issues about Samsungs SG2 (2.3.4) concerning the compatibility of Apps. Many potential users of our app with a SG2 report that the Android Webstore thinks the app is not compatible and that the app is not visible on the Android Market App. Whereas the same users are able to install and use the app without any problems if they download the app from Android Pit.

Edit: I have not set a maximum 开发者_运维技巧SDK Version. Min SDK-version is 7. According to the developer console there are already some users with SGS2.

Edit2: Here are some parts of the manifest:

    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="my.app.full" android:installLocation="auto"
    android:versionName="1.1" android:versionCode="1">
    <uses-sdk android:minSdkVersion="7" />


    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <application android:icon="@drawable/icon" android:label="@string/app_name"
        android:name="myAppPlaceholderName">
        <!-- Activities left out -->


        <receiver android:name="my.app.OnebyOneWidgetProvider">
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>
            <meta-data android:name="android.appwidget.provider"
                android:resource="@xml/one_by_one_widget_info" />
        </receiver>
        <supports-screens android:anyDensity="true"
            android:largeScreens="true" android:smallScreens="true"
            android:normalScreens="true"  android:xlargeScreens="false"  android:resizeable="true" />
    </application>
</manifest>

I am also using the deprecated copy protection of androidmarket.