CommentsAcceptanceTest - testAddEmptyReply fails intermittently

junit.framework.AssertionFailedError: Unable to find link with id [reply-comment-327691]
	at junit.framework.Assert.fail(Assert.java:47)
	at junit.framework.Assert.assertTrue(Assert.java:20)
	at net.sourceforge.jwebunit.junit.WebTester.assertLinkPresent(WebTester.java:1414)
	at net.sourceforge.jwebunit.junit.WebTester.clickLink(WebTester.java:2022)
	at com.atlassian.confluence.it.content.EditContentBean.replyToComment(EditContentBean.java:180)
	at com.atlassian.confluence.it.content.ViewContentBean.replyToComment(ViewContentBean.java:211)
	at com.atlassian.confluence.CommentsAcceptanceTest.testAddEmptyReply(CommentsAcceptanceTest.java:494)