The most common situation we come across is organisations who still rely upon complex, multi-layered folder structures, which can sometimes disappear down as far as 50 levels - into a dark abyss of useless, irretrievable business knowledge. These kind of structures hinder discoverability, and make any kind of version control next to impossible.
A classic example is when a user locates a file, and when trying to open it they receive a message that it is locked by another user. It is (unfortunately) very standard behaviour for the person to then save themselves a copy of the file, rename it and suddenly two versions of the document exist. The knock on effect is then felt when a third person goes through the (very painful) search process and, if lucky enough to locate any files with a keyword search, two files now appear with no distinction as to which is current.