Yet Another disappearing tasks problem
I suppose all problems with the tasks today are related, so I will decribe my interaction in hope it will help to find a solution.
Today I entered some tasks for some projects (with due date today). I switched to "today view". I had a taks group "* task x" which contained several other subitems. After I pressed the arrow to show the subitems, my recently created tasks appeared (!) ordered below the "* task x" group. They did were hidden after I collapsed the "* task x" group. The tasks, which disappeared, were not subitems, nor were they in the same project.
It was then, that I relized, that not alle items on my today view were shown.
Hope this helps,