Restoring from time machine to older OS

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Pat MacInnes
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So, even after wiping my HD and restoring from my Time Machine drive, my MBP has major problems with Safari, retaining my home wireless connection, general slow-down problems and web pages failing to load (especially FB and youtube).

I'm thinking of wiping my drive and zeroing to start 'fresh' so to speak, and doing so from the original MPB software disks. I know the system disks are Leopard 10.5 and that after doing several updates, I'm actually on 10.5.8 now.

My big question is: although TM has been present since the introduction of Leopard, will restoring from my TM disk to a slightly older OS cause me problems with A) restoring files, and B) allow me to keep backing up without having to start a whole new TM back-up on another HD?

I have read people doing this back to 10.4 (which didn't have TM) have suffered problems with file compatibility but I'm going from 10.5.8 back to 10.5.0 (which I'll then update).

I'll be reinstalling my software (including the mac software like Safari, iCal etc) mnully from the original disks to make sure everything is fresh.

I know it all sounds a bit convoluted but I'm thinking that effectively going back to how the machine was when I bought it may help me avoid the problems I'm suffering now after a few years of just updating and really bad file management....
 
I've never needed to do a full restore from Time Machine, when I got my new Mac I just imported my home folder. I did that to avoid just adding all the clutter from my old system straight onto my new one.
 
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