"I am a bit more concerned about Soundcloud downloads. I used the Activity window for this before. I tried an extension and a bookmarklet now but no go. Any tips there?"
I spent much of yesterday afternoon struggling with this.
There are extensions for Safari that facilitate the downloading of Flash video, but I have yet to find one that works for Flash -audio-.
Complicating matters is that the "Resources" window in Safari 6 (which purports to "replace" the old-style "Activity" window) doesn't show item sizes, which made it easy to pick out an audio file amongst many others, due to its larger size.
I finally gave up and found that there's an "add-on" in FireFox that works for both Flash video AND audio files, called "FlashGot 1.4.7".
This solved the problem of downloading streaming audio for a couple of sites I visited. Note -- I just tried it on SoundCloud as well, and it seems to work there for grabbing audio.
Yes, it's more work to keep a second browser around, and have to open FireFox and re-navigate to where the file is you wish to "grab".
But -- unless and until Apple yields to the requests to re-activate the "Activity" menu in future versions of Safari -- it's a "workaround" that's better than nothing.
Rant follows:
The removal of the "Activity" window seems to have been intentional on Apple's part, to reduce or elminate the user's ability to "grab" music and video files from various web pages. If, while running Safari 6, you go to the Developer menu and choose to load the same page using Safari 5.1.7, it works and the "Activity" menu choice is still there, BUT -- it's "grayed out" and un-selectable.
What this portends is Apple's intent to gradually remove "capabilities" from Safari, with the goal of making it more "iOS-like" -- no longer "the power to be your best", but soon-to-become "just the power we LET you have"....