There doesn't seem to be a way to save changes to a presentation
Steps:
1)ctrl-p
2)Fill in something in the field for presentation
3)Try to save it
Expected results:
*There is a button or similar to save the modified presentation
Actual results:
*No way to save the presentation, and when the conference info page is closed the changes are lost
Tested 0.11.0.1280 on WinXP.