selenium2Library报错： Unexpected error launching Internet Explorer. Browser zoom level was set to 119%. It should be set to 100%

Exception in thread "main" org.openqa.selenium.remote.SessionNotFoundException: Unexpected error launching Internet Explorer. Browser zoom level was set to 119%. It should be set to 100% (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 5.98 seconds

错误原因：IE浏览器的比例调大了，按ctrl+0，可以恢复原来的大小，即可。PS：这种错误真是。。。让人无语。