Bug 339347 [Markers] Can't toggle item limits in Problems view any more without losing limit
I20110308-2000 I can't toggle item limits in Problems view any more without losing limits. After I've disabled the limits, the next time I enable limits, the value is "1". The stored value should not be changed.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
* 
	 * @param mementoString
	 */
	private void loadFiltersFrom(String mementoString) {
		if (mementoString.equals(IPreferenceStore.STRING_DEFAULT_DEFAULT))
			return;
		try {
			loadFilterSettings(XMLMemento.createReadRoot(new StringReader(
					mementoString)));
		} catch (WorkbenchException e) {
			StatusManager.getManager().handle(e.getStatus());
		}
	}
	/**
	 * Load the filters preference.
	 */
	private void loadFiltersPreference() {
		loadFiltersFrom(IDEWorkbenchPlugin.getDefault().getPreferenceStore()
				.getString(getMementoPreferenceName()));
		String legacyFilters = getLegacyFiltersPreferenceName();
		String migrationPreference = legacyFilters
				+ MarkerSupportInternalUtilities.MIGRATE_PREFERENCE_CONSTANT;
		if (IDEWorkbenchPlugin.getDefault().getPreferenceStore().getBoolean(
				migrationPreference))
			return;
		
		loadLegacyFiltersFrom(IDEWorkbenchPlugin.getDefault()
				.getPreferenceStore().getString(legacyFilters));
		
		IDEWorkbenchPlugin.getDefault().getPreferenceStore().setValue(