I have never actually tried this, but if you have only got 1 tuner, you might need both zap and record.
Out of paranoia I would click the record button. Then the edit button and checkbox zap and record.
Thank you! I'm unable to edit a timer, I can only click on "add timer" icon from the EPG but if I click the edit icon the webif interface hangs (crashes). This is the same issue that I experience if I just click "add a timer" from the main webif interface. The only way for me to set a timer is by going to the EPG windows and from there I select a program and add its timer (without editing). I don't know why the other options just don't work...