The "blocked ear" thing has happened to me twice, and both times I didn't have a cold or any nasal congestion of any type. I usually find it quite hard to equalise the pressure in my right ear, depending on how often I've flown. The more I fly the easier it gets. I have no idea why?!?!
All the posts above sound quite serious, should I seek medical advice about it? When I did my flight attendant medical they said everything was ok with me. Anyone else have the same problem? Can anyone shed any light on the matter??