Thanks guys; so it seems that the problem was somehow the OS itself....got an update with some patch and once I restarted the computer, it seems to work fine again.
The memory stays low, I don't get anymore Safari spinning beach ball left and right, when you have few pages open.
To be honest, I've also updated flash; and now it seems to work as intended: when you are not watching a video, the plugin on that page deactivate, so it won't retain memory while you don't watch it. When you want to watch the video, just click on the video and the disabled message disappear.
Not sure if it was Apple messing up, Safari plugin or Flash, but I am glad that now I have no slow down and no memory issues, doing exactly what I was doing before
OK, sorry if that came off wrong. But it wasn't clear from your original description if there was a problem. There are too many threads saying "OMG, I have no free memory. That file cache thing is sucking all my memory. How do I turn it off?" when there is no problem.
No worries Mfram; I get your point and sadly, I get why you came out in that way...I am no rocket scientist, but I understand that many on forums are still making electricity with hamsters on a wheel, running pentium 2 computers and power mac PPC 400 MHz; which has limited knowledge of what is going on, and when they see something weird, they go around freaking out.
I tought that you were just flaming because I was trying to do something that goes against the guru at Apple
They are humans like us, they can make mistakes, and I would not think lesser of them, just because they mess up something (if they fix it lol, otherwise I do get pissed). Glad that we clarified; I don't like useless discussions just for the sake of a fight.