"...what i can't tell is if they are only updating the UI and developer features, or if they also plan on a new Flash player..." A public beta of the Macromedia Flash 5 Player can be downloaded from : http://www.macromedia.com/shockwave/download/alternates/ This way you can test that sites are correctly rendered with the new player. "...if it's a new Flash player, will we see something like browser adoption curves here? people won't get the latest because they don't care?..." A poor comparison as updating the Flash player is not the same as updating a browser (unless you use Opera ;), that is). The Flash player has had for some time now an auto update feature that simplifies the process and as Flash player is now incorporated in I.E. it will turn up in Microsoft's browser update also. The Flash3/Flash4 change motivated a lot of discussion at the time just because of this. Would users update ? How soon should one start using Flash4 specific features? Many said it would take ages for users to update to the new 4 player, but as time went by and the discussion dragged on the Macromedia site continued quietly delivering hundreds of thousands of players per day, and the whole matter just faded away into the mists of internet ancient history. I'm sure we'll see a replay of the 3/4 discussion and I'm also sure it will be solved the same way the last one was. Some people will waste time expanding their arguments others will just start producing with Flash5, while the Macromedia server will go on dispensing the player time and time again without stop. .redstar.