Created attachment 497160 [details]
The error in the displayed dialogue.

Description of problem:
When Copying a second file after initiating the first the dialogue displays two copying progresses in the summary. If a third copy-paste or move is initiated then the third activity is also displayed twice.

Version-Release number of selected component (if applicable):

3.0.1
How reproducible:
Everytime all the time.

Steps to Reproduce:
1. Start copying a large file so the dialogue does not disappear immediately.
2. Simultaneously copy another file (Activity will add two progress bars within the same dialogue rather than one)
3. Now start a third simultaneous copy-paste
  
Actual results:
Activity will add two progress bars within the same dialogue rather than one.
Third copy-paste also displays as two activities. Stopping either activity in either "set" kills both showing that they are in fact twin progress bars displaying the same activity's status.

Expected results:
A progress bar per additional activity should be displayed rather than the additional copying or moving acitivity being displayed twice.
Stopping one should only stop the single activity.
Additional info:
I saw it in openSUSE's gnome 3 release too so it might be a problem with nautilus.