Reasons why Dropbox could be accessing files it should not be accessing

Question

I was just using SysInternals ProcMon.exe to track down a problem and found Dropbox.exe accesing files outside of the Dropbox folder I have configured.

My Dropbox location is at C:\users\pats\Dropbox

I see the following in a ProcMon log I was studying:

QueryOpen \\host\share\users\pats\somedir\myfile.7z

Does anyone have an idea why Dropbox.exe is accessing files outside of the configured Dropbox directroy? Other than the obvious bad reasons (like its copying all of your files, its a Trojan, etc)?

Does anyone else see this behavior when running Dropbox and SysInternals ProcMon.exe?

NOTE: I didn't see Dropbox.exe reading the data (at least from the ProcMon log I looked at) so perhaps it's a "feature" not a bug.

NOTE 2: This post on the Dropbox forums discusses a concern of Dropbox having a Trojan in it, but it basically says that there is no Trojan in Dropbox.