Frequent Crash with 481 Build

[Shonumi]

Try and find the exact revision that causes the frequent crashes. I'd try 4.0 and some half-way point from the latest development revision (like 4.0-250, not an exact halfway point, but whatever). If it doesn't happen in 4.0 but happens in 4.0-250, you know that the culprit revision was introduced somewhere between the two. Cutting the number of revisions you test in half like that is helpful to quickly narrow down the range, though sometimes finding the specific revision you're after takes a bit more work than that.