Notification email has stack track for body

A coworker (at xpedxit.atlassian.net) made a change to a JIRA story I was watching and I received the following in the notification email (see below). If it matters, the notification should have been that he had moved it from one pre-sprint to another.

An error occurred whilst rendering this message. Please contact the administrators, and inform them of this bug. Details: ------- org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getIssueTypeIconUrl' in class com.atlassian.jira.mail.util.MailAttachmentsManagerImpl threw exception java.lang.IllegalArgumentException: The resource path http://cdn2.iconfinder.com/data/icons/freecns-cumulus/32/519906-10_Cloud_Lightning-48.png is not valid at templates/email/macros.vm[line 324, column 69] at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:337) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:284) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:262) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:342) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:212) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:247) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336) at org.apache.velocity.runtime.parser.node.ASTStringLiteral.value(ASTStringLiteral.java:290) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:212) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:247) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336) at org.apache.velocity.runtime.RuntimeInstance.render(RuntimeInstance.java:1276) at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1215) at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1164) at org.apache.velocity.app.VelocityEngine.evaluate(VelocityEngine.java:219) at com.atlassian.velocity.DefaultVelocityManager.writeEncodedBodyForContent(DefaultVelocityManager.java:86) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest.toWriterImpl(DefaultVelocityTemplatingEngine.java:157) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest.asPlainText(DefaultVelocityTemplatingEngine.java:128) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest$1.with(DefaultVelocityTemplatingEngine.java:108) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest$StringRepresentation.toString(DefaultVelocityTemplatingEngine.java:88) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest.asPlainText(DefaultVelocityTemplatingEngine.java:110) at com.atlassian.jira.mail.builder.EmailRenderer.renderEmailBody(EmailRenderer.java:113) at com.atlassian.jira.mail.builder.EmailRenderer.render(EmailRenderer.java:166) at com.atlassian.jira.mail.builder.EmailBuilder.renderNow(EmailBuilder.java:162) at com.atlassian.jira.mail.builder.EmailBuilder.renderNowAsQueueItem(EmailBuilder.java:152) at com.atlassian.jira.mail.MailingListCompiler$1.processRecipient(MailingListCompiler.java:311) at com.atlassian.jira.mail.NotificationRecipientProcessor.process(NotificationRecipientProcessor.java:39) at com.atlassian.jira.mail.MailingListCompiler.addMailsToQueue(MailingListCompiler.java:332) at com.atlassian.jira.mail.MailingListCompiler.access$200(MailingListCompiler.java:47) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.addEmailsToQueue(MailingListCompiler.java:455) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendLists(MailingListCompiler.java:425) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendNoLevelsIgnoreGroup(MailingListCompiler.java:405) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendToAll(MailingListCompiler.java:400) at com.atlassian.jira.mail.MailingListCompiler.sendLists(MailingListCompiler.java:145) at com.atlassian.jira.mail.IssueMailQueueItem.send(IssueMailQueueItem.java:150) at com.atlassian.mail.queue.MailQueueImpl.sendBuffer(MailQueueImpl.java:66) at com.atlassian.jira.mail.JiraMailQueue$1.apply(JiraMailQueue.java:57) at com.atlassian.jira.mail.JiraMailQueue$1.apply(JiraMailQueue.java:53) at com.atlassian.jira.util.velocity.DefaultVelocityRequestContextFactory.runWithStaticBaseUrl(DefaultVelocityRequestContextFactory.java:127) at com.atlassian.jira.util.DefaultBaseUrl.runWithStaticBaseUrl(DefaultBaseUrl.java:58) at com.atlassian.jira.mail.JiraMailQueue.sendBuffer(JiraMailQueue.java:52) at com.atlassian.jira.service.services.mail.MailQueueService.run(MailQueueService.java:30) at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:66) at com.atlassian.jira.service.ServiceRunner.runService(ServiceRunner.java:77) at com.atlassian.jira.service.ServiceRunner.runServiceId(ServiceRunner.java:54) at com.atlassian.jira.service.ServiceRunner.runJob(ServiceRunner.java:37) at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:153) at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:118) at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:97) at com.atlassian.scheduler.quartz1.Quartz1Job.execute(Quartz1Job.java:32) at org.quartz.core.JobRunShell.run(JobRunShell.java:223) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549) Caused by: java.lang.IllegalArgumentException: The resource path http://cdn2.iconfinder.com/data/icons/freecns-cumulus/32/519906-10_Cloud_Lightning-48.png is not valid at org.apache.catalina.webresources.StandardRoot.validate(StandardRoot.java:250) at org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:212) at org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:206) at org.apache.catalina.core.ApplicationContext.getResource(ApplicationContext.java:557) at org.apache.catalina.core.ApplicationContextFacade.getResource(ApplicationContextFacade.java:199) at com.atlassian.jira.mail.util.MailAttachmentsManagerImpl.getImageUrl(MailAttachmentsManagerImpl.java:144) at com.atlassian.jira.mail.util.MailAttachmentsManagerImpl.getIssueTypeIconUrl(MailAttachmentsManagerImpl.java:98) at sun.reflect.GeneratedMethodAccessor2317.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:385) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:374) at com.atlassian.velocity.htmlsafe.introspection.UnboxingMethod.invoke(UnboxingMethod.java:30) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:270) ... 58 more