In a Google Groups thread, users are reporting that they are not able to share or view maps that are created by others. This error has been reported since July 29th and a number of users are impacted (but others are not).
After heated discussions on the thread and 56 messages with a number of members trying to illustrate the problem, Maps Guide Mike says that this is a bug that was indeed fixed and that they will push the fix externally soon.
Forum discussion continues at Google Groups. Additional coverage is at Google Personalizes Maps by Adding "My Maps" Feature and Google Maps Supports User Generated Reviews.
