Adobe's installer is a piece of shit.
~350MB of files, around 1.5GB installed (at least it tells me it will take this much space).
I can copy 350MB of data to this drive in about 4 seconds. 1.5GB in under 15. This Photoshop installer has been going for about half an hour now. Half an hour.
What the hell is so hard, Adobe? Put your files, spam my registry with entries (of which perhaps 5% are actually needed), and then get the hell off my screen.
Adobe CS3 and CS4 installers do not even complete the installation on my machine. They fail to even install, guaranteed, each and every time. I expect this one to also, if it ever actually finishes.
[edit] And why should I have to close firefox to install photoshop? Fuck off.