[Bug 26543] New: Second press on monthcal drop down button doesn't working

http://bugs.winehq.org/show_bug.cgi?id=26543

Summary: Second press on monthcal drop down button doesn't
                    working
           Product: Wine
           Version: unspecified
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=33801)
 --> (http://bugs.winehq.org/attachment.cgi?id=33801)
trace with WINEDEBUG=+monthcal

After selecting date in monthcal control by pressing button second press
doesn't create calendar window. After third press application exits with
Segmentation fault.
So user cannon change date using calendar.
Changing date in textbox works.

Bug appears in Medialog software (medical database).
Software is written on Delphi.