Bug 52585 [About] "more info" on plugin in about box puts up error dialog
Select Help | About | Plug-In Details. In the dialog select the Plug-In Core Boot. Click "More Info" Get an error dialog with title "bundleentry://16/about.html" and text "Windows cannot access the specified device path or file. You may not have the appropriate permissions to access the item."
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/AboutPluginsDialog.java
if (vendorInfo == null)
			return false;
		return (vendorInfo.getSelectionCount() > 0);
	}
	/** 
	 * Respond to moreInfo button pressed.
	 * 
	 */
	protected void handleMoreInfoPressed() {
		TableItem[] items = vendorInfo.getSelection();
		if (items.length == 0)
			return;
		int i = vendorInfo.getSelectionIndex();
		IPluginDescriptor desc = info[i];
		openMoreInfo(desc);
	}
	/** 
	 * Open html file containing additional info about the selected
	 * plugin.
	 * 
	 */
	private void openMoreInfo(IPluginDescriptor desc) {
		URL infoURL = desc.find(new Path(PLUGININFO));
		if (infoURL == null) {
			MessageDialog.openError(
				getShell(), 
				IDEWorkbenchMessages.getString("AboutPluginsDialog.errorTitle"), 
				IDEWorkbenchMessages.format("AboutPluginsDialog.unableToOpenFile", new Object[] {PLUGININFO, desc.getUniqueIdentifier()})); 
			return;
		}