Validation for JIRA credentials passes, but login always fails.

The credentials are validated on the JIRA site too, so I know they are correct.

Product Version: NetBeans IDE 8.0.2 (Build 201411181905)
Java: 1.8.0_11; Java HotSpot(TM) 64-Bit Server VM 25.11-b03
Runtime: Java(TM) SE Runtime Environment 1.8.0_11-b12
System: Windows 8 version 6.2 running on amd64; Cp1252; en_GB (nb)

INFO [org.netbeans.modules.jira.Jira]: validate for [*,https://*,*@*,******,null,******] worked.
INFO [org.netbeans.modules.git.status]: GitInterceptor.refreshTask: Scanning in progress, trying again in 10,000ms
INFO [org.netbeans.modules.jira.Jira]
org.eclipse.core.runtime.CoreException: Unable to login to https://*. Please validate credentials via Task Repositories view.
	at com.atlassian.connector.eclipse.internal.jira.core.JiraRepositoryConnector.updateRepositoryConfiguration(JiraRepositoryConnector.java:432)
	at org.netbeans.modules.jira.repository.JiraRepository$1ConfigurationCommand.execute(JiraRepository.java:552)
	at org.netbeans.modules.jira.commands.JiraExecutor.execute(JiraExecutor.java:127)
	at org.netbeans.modules.jira.commands.JiraExecutor.execute(JiraExecutor.java:106)
	at org.netbeans.modules.jira.repository.JiraRepository.getConfigurationIntern(JiraRepository.java:559)
	at org.netbeans.modules.jira.repository.JiraRepository.getConfiguration(JiraRepository.java:523)
	at org.netbeans.modules.jira.repository.JiraRepository.createQuery(JiraRepository.java:156)
	at org.netbeans.modules.jira.JiraRepositoryProvider.createQuery(JiraRepositoryProvider.java:78)
	at org.netbeans.modules.jira.JiraRepositoryProvider.createQuery(JiraRepositoryProvider.java:54)
	at org.netbeans.modules.bugtracking.RepositoryImpl.createNewQuery(RepositoryImpl.java:260)
	at org.netbeans.modules.bugtracking.ui.query.QueryTopComponent$9.run(QueryTopComponent.java:650)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)