The beta of Firefox 3.1 has been pushed back to mid September.
At the Mozilla group's weekly meeting Tuesday, one developer said "there is a big gap between the features planned for 3.1 and what will make it if we freeze on the 19th."
Since the team is pushing back the beta code freeze for three weeks, users won't have it in hand until mid next month.
The Firefox team originally planned to freeze the beta code on August 19th but have now set the date for beta freeze on September 9. In the interim, the team will freeze the code for alpha 2 on the 19th.
Alpha 1 was released on July 28th. Beta 1 is now tentatively scheduled for September 9th. Based on the input during the 75 minute meeting, the pushback has more to do with the heaver summer vacation period than technical difficulties.