silliest thing that i've done was:
i was changing the theme for my log which runs on wordpress. The default logo are most likely in "themename/images" folder. I was kinda drunk that night, i kept looking for logo for about 2 hours, but DAMN!! couldnt find that. Ultimately i contacted the theme owner asking how to change it, and she said "theme-name/images/logo.png" and i was DAMN embassassed.