When we check our burndown chart and its projection, GreenHopper displays the chart based on the latest information. Some of our team members log their work through out the day, while many others log theirs at once before leaving the office. When we check the burndown chart, it can be misleading because we want to check the data, and the projections based on them, logged before today, not including today's entries and times passed since end of yesterday.

I found a request elsewhere on the web that existentially says the same:
http://www.greenpeppersoftware.com/site/posts/list/614.page