I'll add another voice to the chorus. Windows XP, SP3, somewhat older ship set in the box. Same problem. 😠
10.4 was running fine then when I upgraded to 10.5 it sounds tinny and squeaky. For those into radio, it sounds like a slightly off frequency station on sideband. Some of my music sounds like R2D2. All of my other playes such as WMP, VLC, and others work fine so it is not my sound card. It sounds like a codec or speed issue or both. Also it is not just the songs resident on my hard drive. When I tried some of the streaming radio channels the sound was the same - broken - so this is serious. 😢
I ran the repair utility from the program installer to no avail. I also did a complete uninstall and deleted all of the bits and pieces elsewhere on the hard drive and cleaned the registry to try a fresh install but got the same results.
I then cleaned the system again and went back to 10.4 and all is working fine for me. However my house cleaning did remove some preferences and a few other things within settings but I wanted to make sure that I had a clean start. The sacrifice is liveable.
Clearly there is a problem and as noted elsewhere in this forum, other people are starting to speak up to reflect the same issue.
I pitty the person who is not adept at downgrading and just blindly accepts upgrades when offered.
Steve... send help from where ever you are. 😍
Unknown if this will be of concern... I also upgraded Safari to the latest at about the same time. That should not have an impact but one never knows. Safari seems to be running OK.