Nokia :: E52 / Crashing Alot / Major Design Flaw

Bought my E52 back in October and been generally pleased with it (besides the buggy m4a support in the music player) until now. But now it's clearly not working as it should.In the past 2 weeks it's been very unstable and been crashing a lot. It took a while until I realized it was the summer heat that caused it, but it's impossible to use the phone outdoors on a warm sunny day or on the upper floor of my house (where it gets very warm), while it works fine down in the basement where it's cool.I think it's a major design flaw of the E52 and now I'm curious how common this issue is, have anyone else had this overheating issue?