We have heard of a few with swimmer's ear. 

A great way to prevent swimmer's ear by using prevention drops after every swim.  You can buy these "SwimEar" or "Auro-Dri" at the store or use a homemade solution of 1/2 91% Alcohol and 1/2 white vinegar.  The alcohol dries out the water and the vinegar keeps the area acidic to combat bacteria.

Go Wahoos!