Beta4 added a few ugly bugs (not data-damaging, but rather gui/stability related).
So I am urgently releasing Beta5...
Fixes some GUI bugs
Fixes some CSS formatter bugs
Fixes some crashes reported by some users
Note that beta version has some additional error-reporting built-in, so it can "crash" a tiny bit more often and generate more error reports. I also want to outline that we really need you to send in any crash reports any way you can and describe any other strange behavior, also confirmation that this or that beta works just fine after heavy use on this or that system are helpful.