True belivers the gentlemen above speak the truth Flash CS4 is by far the best of the versions in alot of aspects but is by far the most unstable release I have seen from Adobe yet you can start to notice slowdowns after adding more then 20 assets into your project and pardon my languege Admins of this site but that is **** I am a flash developer and have projects with hundreds of assets and when opening them in CS4 it comes to a screaming halt with times of 30 and more seconds to go into movie clips and god help you if you wanna make big changes to these files. Adobe has screwed us bad with Flash CS4 and is not responding to our cries for help so if your reading this DO NOT BUY or UPGRADE to Flash CS4 and this is coming from an adobe freak.

They best fix this scam soon or I for one who paid for this CRAP will drop them like a ton of bricks.