Has this problem been fixed? I see that there are numerous posts about this problem over the past several years but I am still experiencing this problem with version 6.0.2333.0
Doing a Repair on the calendar does not fix the problem. Even after a Repair, dismissing a reminder closes the reminder pop-up but it reappears shortly thereafter. The only thing that works is to then disable the reminder in the event, but that approach is a very awkward workaround.
Surely this problem has been addressed after all these years.