[tomxor]

Similar story, I made an IE6 PNG transparency "fix" that used some IE specific image filter language (I can't even remember what anymore).

On some computers without enough memory the "fix" crashed the entire OS with a bluescreen (no idea what the bug was because I didn't have windows, and because... well it's windows, I think I developed it in WINE!). I only found this out through a client complaining about their clients computers bluescreening when visiting their site... this was probably 2008-ish, so not exactly peak IE6, but it was the phase where a bunch of orgs still forced everyone to use it under the ridiculous premise of "security".