Sorry for the delay in replying, holidays and all that… Happy New Year…
>>Do you have your solution stored on a network share?
Yes, the entire project is on a network drive
>>Do you use many external files or linked files stored in a separate location?
Yes, lots of linked classes, user controls and references, all to network drives.
>> Is there anything special about your build process, custom build actions, etc.?
Nope, nothing additional
>>Can you reproduce that with every solution on your machine or just with one particular solution?
Happens in most of the network drives based solutions