Double-clicking in or out of symbols takes 10 seconds! (not fun)

I installed Flash 8 on my new awesome computer… everything’s super fast, I can play freaking new games on max settings without lag… but when I double click on a symbol in Flash 8 to edit it, a dotted selection-line (like with the rectangle selection tool) very … slowly… expands from the object until it fits the stage. THEN it zooms in. The whole process takes almost 10 seconds. It does the same when you zoom out. This makes it completely impossible to do anything. What the hell!!! (anyone know how to make it work? I need my Flash lovin’!)

System:
2.4Ghz dual core
2GB dual-channel 800Mhz ram
Windows Vista Ultimate, 64bit (oh noes)

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