Mechanical question on front suspension

I recently parted with my hard earned for a '01 Volvo S60....Shortly after I got it there was a kind off knocking noise from the front drivers side, brought it back and they changed a 'bushing' under warranty, seemed to solve it...Problem now is that every morning (or evening if I haven't driven the car all day) it sounds like the front suspension is going to cave in, all squeeks and grinding etc. It seems to disappear after 3/4 miles of driving though.

It's still under warranty so I'm going to bring it back to the garage but it means I'll have to leave it with them overnight so they can actually witness what's going on for themselves....

Has anyone any idea what could be causing this ?
Thanks,

r2d2

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