I have had the Exmark 26" metro since May and have had many issues with it. The mulching problem is common. I too have expereinced it. We tried different things like using a baffle, mulching with the high lift blade rather than the mulching blade but nothing seemed to work. It is absolutely atroscious in any grass that is slightly long, wet or damp. Exmark has tried to fit my unit with update kits but nothing as solved the issues with this unit. I would like a refund but none is upcoming as far as I know. As anyone heard of a class action lawsuit?