I am had the stat error but the WM1.4.6 and HM1.3.8 have solved my problem; however, several users still had the problem so the webmail author released beta version for those.
You can try the following beta version of the hotmail.xpi that the webmail author released. https://docs.google.com/open?id=0B12SpPN0s2lAOWY4OTg2MDItYTMyMC00YjNkLTg3ZDEtZDllNDUxMmZkMjIz Please beware that several users are reporting broken downloads the author is working that problem.
