We've just changed the system of task priorities again, but hopefully this will be the last time. We still have project priorities, which can only be set by administrators. The task priorities now have the values "very low", "low", "normal", "high", and very "very high". Internally we calculate the final priority from the project and task priorities.
Notice: setting all your tasks to "very high" won't give you any benefits, because we're balancing the priorities internally! So better to distribute priorities evenly within your project.
2nd notice: we had to reset all task priorities to "normal", so it is up to you to re-prioritize your tasks.