Bug 94367 cannot clear compiler compliance setting at the project level
i200505092010 Cannot disable the Java compiler project-specific preferences for some projects. Steps to reproduce: 1 - check out from CVS a Java project that has project-specific Java compiler settings enabled (example: org.eclipse.core.runtime). 2 - open the properties dialog for the project, select the Java compiler node, disable project-specific Java compiler preferences. 3 - Commit the changes by pressing "Ok" and reopen the properties dialog. It looks like the settings were not saved (project-specific settings are still enabled).
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/OptionsConfigurationBlock.java
settingsUpdated();
		updateControls();
		validateSettings(null, null, null);
	}
	/**
	 * @since 3.1
	 */
	public void performRevert() {
		for (int i= 0; i < fAllKeys.length; i++) {
			Key curr= fAllKeys[i];
			String origValue= curr.getStoredValue(fLookupOrder, false, null);
			curr.setStoredValue(fLookupOrder[0], origValue, fManager);
		}
		settingsUpdated();
		updateControls();
		validateSettings(null, null, null);
	}
	
	public void dispose() {
	}
	
	protected void updateControls() {
		
		for (int i= fCheckBoxes.size() - 1; i >= 0; i--) {
			updateCheckBox((Button) fCheckBoxes.get(i));
		}
		for (int i= fComboBoxes.size() - 1; i >= 0; i--) {
			updateCombo((Combo) fComboBoxes.get(i));
		}
		for (int i= fTextBoxes.size() - 1; i >= 0; i--) {