Useramount goes to zero after stat calculation (FIX #423) 

git-svn-id: http://2moons.googlecode.com/svn/trunk@2628 b16e238e-0886-11df-aae1-e754eacfc418
Add exception for possible error.

git-svn-id: http://2moons.googlecode.com/svn/trunk@2629 b16e238e-0886-11df-aae1-e754eacfc418