Mail handler Special encoding filename attachment problem

Hi,

Have you experienced something problem with weird filename attachements in email processing?

The issue is continuously created, agan and again.
The emial wasn't deleted, and the mail handler process it again.

Exchange 2010 server IMAP protocol.

We got email with this attachement name,We think that could cause this problem:
ISO-8859-1''bo j�zsef.pdf

2013-12-01 16:46:55,906 QuartzScheduler_Worker-2 WARN ServiceRunner MyMailHandler [atlassian.mail.incoming.mailfetcherservice] MyMailHandler[10202]: Unable to create issue with message.

java.lang.NullPointerException

at javax.mail.internet.MimeUtility.quote(MimeUtility.java:974)

at javax.mail.internet.ParameterList.quote(ParameterList.java:658)

at javax.mail.internet.ParameterList.access$200(ParameterList.java:75)

at javax.mail.internet.ParameterList$ToStringBuffer.addNV(ParameterList.java:626)

at javax.mail.internet.ParameterList.toString(ParameterList.java:607)

at javax.mail.internet.ContentType.toString(ContentType.java:221)

at com.sun.mail.imap.IMAPBodyPart.<init>(IMAPBodyPart.java:82)

at com.sun.mail.imap.IMAPMultipartDataSource.<init>(IMAPMultipartDataSource.java:70)

at com.sun.mail.imap.IMAPBodyPart.getDataHandler(IMAPBodyPart.java:288)

at javax.mail.internet.MimeBodyPart.getContent(MimeBodyPart.java:637)

at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.handleMultipart(AbstractMessageHandler.java:649)

at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.createAttachmentsForMessage(AbstractMessageHandler.java:622)

at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.handleMessage(CreateIssueHandler.java:258)

at com.atlassian.jira.plugins.mail.handlers.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:133)

at com.metainf.jira.plugin.emailissue.handler.AutoReplyMailHandler.handleMessage(AutoReplyMailHandler.java:240)

at com.atlassian.jira.service.services.mail.MailFetcherService$1.process(MailFetcherService.java:368)

at com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl.getAndProcessMail(MailFetcherService.java:271)

at com.atlassian.jira.service.services.mail.MailFetcherService.runImpl(MailFetcherService.java:356)

at com.atlassian.jira.service.services.file.AbstractMessageHandlingService.run(AbstractMessageHandlingService.java:257)

at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:61)

at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:48)

at org.quartz.core.JobRunShell.run(JobRunShell.java:195)

at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)