Passwords kept in plaintext... why, oh why, oh why?!?!
Here's a story of the first working installation of VMware Horizon Client and VMware Workstation on a single Linux machine.
Who would have thought that ghosts of the past might not only haunt you in your dreams but also in your vSphere environment...
When I was still working as a backup administrator, one of my biggest day-to-day concern was finding enough space to save all the "archive" level data (a.k.a. infinite retention junk). This kind of data can over time consume absolutely terrifying amount of storage space.