I am trying out 3.5.0 beta0, and I am getting repeated and erroneous "Document Has Been Changed by Others" errors after saving a file (with Calc). Sometimes they eventually go away on Save Anyway or Cancel, and other times I must kill soffice.bin instead. The files are on my unshared desktop so should not be accessible to others.
I have this problem as well. It makes the beta nearly unusable and results in many data losses.
This is working fine for me now with beta2.
@Scott M. Sanders Thank you for your feedback!