They have been consistently buggy and keep breaking things on my system. I've only had a mac for around 9 months - every update has broken something different:
10.5.6 : macbook pro wouldn't wake up from sleep - just had endless spinning colour wheel. Also couldn't access my bank online using Safari
smc 1.3 firmware update : my machine now idles 5 - 10 degrees hotter and the fans kick in much quicker - even when simply watching youtube or a very processor unintensive logic session. There is no way to roll back to previous firmware versions
10.5.7 : was pretty good - but may have added to the smc 1.3 heat build up.
Airport firmware 7.4.2 : my usb drive attached to my airport extreme disconnects when copying files larger than around 50 meg and is generally unstable - I am currently running 7.4.1 which works well.
10.5.8 : As a lot of people are experiencing this update has broken my networking - I am only getting 1 megabyte per second when on battery power and full speed only when plugged into mains power. ( FIXED BY PATCH )
Logic 9 double clicking on an arrangement launches Logic but not the project - you have to double click again once Logic has launched. Also when bouncing to a file various settings are not remembered (eg. realtime / offline bounce) You must set this up every time you want to bounce a project .
Have they got there good programmers working on Snow Leopard or is that going to be riddled with bugs too ? come on
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feel free to add to my list of what update broke stuff on your system ...
10.5.6 : macbook pro wouldn't wake up from sleep - just had endless spinning colour wheel. Also couldn't access my bank online using Safari
smc 1.3 firmware update : my machine now idles 5 - 10 degrees hotter and the fans kick in much quicker - even when simply watching youtube or a very processor unintensive logic session. There is no way to roll back to previous firmware versions
10.5.7 : was pretty good - but may have added to the smc 1.3 heat build up.
Airport firmware 7.4.2 : my usb drive attached to my airport extreme disconnects when copying files larger than around 50 meg and is generally unstable - I am currently running 7.4.1 which works well.
10.5.8 : As a lot of people are experiencing this update has broken my networking - I am only getting 1 megabyte per second when on battery power and full speed only when plugged into mains power. ( FIXED BY PATCH )
Logic 9 double clicking on an arrangement launches Logic but not the project - you have to double click again once Logic has launched. Also when bouncing to a file various settings are not remembered (eg. realtime / offline bounce) You must set this up every time you want to bounce a project .
Have they got there good programmers working on Snow Leopard or is that going to be riddled with bugs too ? come on

feel free to add to my list of what update broke stuff on your system ...