Product Version = NetBeans IDE 7.4 Beta (Build 201307092200)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.7.0_25
Runtime = Java HotSpot(TM) 64-Bit Server VM 23.25-b01

Commit to SVN. In the commit box "Update issue" ist opened and "JIRA" selected. The issue key (ID)  is entered and Netbeans finds an issue, which is selected.
"Update details" is checked.
The SVN commit is executed successfully. But no changes are made to the JIRA item (as far as I see there's no entry in the changes history of JIRA). Instead Netbeans shows a dialog containing the following text:
"
A org.openide.util.RequestProcessor$SlowItem exception has occurred.
"
and the following stack trace:
"
java.lang.AssertionError
	at org.netbeans.modules.bugtracking.cache.IssueCache.setSeen(IssueCache.java:269)
	at org.netbeans.modules.jira.issue.NbJiraIssue.setSeen(NbJiraIssue.java:924)
	at org.netbeans.modules.jira.issue.NbJiraIssue.submitAndRefresh(NbJiraIssue.java:1394)
	at org.netbeans.modules.jira.issue.NbJiraIssue.addComment(NbJiraIssue.java:856)
	at org.netbeans.modules.jira.JiraIssueProvider.addComment(JiraIssueProvider.java:98)
	at org.netbeans.modules.jira.JiraIssueProvider.addComment(JiraIssueProvider.java:52)
	at org.netbeans.modules.bugtracking.IssueImpl.addComment(IssueImpl.java:159)
	at org.netbeans.modules.bugtracking.api.Issue.addComment(Issue.java:234)
	at org.netbeans.modules.bugtracking.vcs.HookImpl.afterCommit(HookImpl.java:184)
	at org.netbeans.modules.bugtracking.vcs.SvnHookImpl.afterCommit(SvnHookImpl.java:90)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.afterCommit(CommitAction.java:923)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.performCommit(CommitAction.java:815)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.performCommit(CommitAction.java:639)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.access$100(CommitAction.java:115)
	at org.netbeans.modules.subversion.ui.commit.CommitAction$5.perform(CommitAction.java:392)
	at org.netbeans.modules.subversion.client.SvnProgressSupport.performIntern(SvnProgressSupport.java:111)
	at org.netbeans.modules.subversion.client.SvnProgressSupport.run(SvnProgressSupport.java:104)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to
	at org.openide.util.RequestProcessor.post(RequestProcessor.java:424)
	at org.netbeans.modules.subversion.client.SvnProgressSupport.start(SvnProgressSupport.java:86)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.startCommitTask(CommitAction.java:395)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.commitChanges(CommitAction.java:225)
	at org.netbeans.modules.subversion.ui.commit.CommitAction.commit(CommitAction.java:151)
	at org.netbeans.modules.subversion.ui.diff.MultiDiffPanel.onCommitButton(MultiDiffPanel.java:880)
	at org.netbeans.modules.subversion.ui.diff.MultiDiffPanel.actionPerformed(MultiDiffPanel.java:748)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
	at java.awt.Component.processMouseEvent(Component.java:6505)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
	at java.awt.Component.processEvent(Component.java:6270)
	at java.awt.Container.processEvent(Container.java:2229)
	at java.awt.Component.dispatchEventImpl(Component.java:4861)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Component.dispatchEvent(Component.java:4687)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
	at java.awt.Container.dispatchEventImpl(Container.java:2273)
	at java.awt.Window.dispatchEventImpl(Window.java:2719)
	at java.awt.Component.dispatchEvent(Component.java:4687)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:694)
	at java.awt.EventQueue$3.run(EventQueue.java:692)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.awt.EventQueue$4.run(EventQueue.java:708)
	at java.awt.EventQueue$4.run(EventQueue.java:706)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
"