I am in the field default value settings section. There is a nice option to make the default value appear as placeholder. The problem I encounter is that if I simply put _anything_ into Default value >> Advanced >> Default value CSS class (so for example I put: "BlahBLah") the placeholder works (When saying 'works' I mean, if I focus my cursor inside the input field the default value disappears)!
If I leave the Default Velue CSS class field blank, the placeholder doesn't work.
The question is: What should I put into the Default Velue CSS class field in order for it to be correct ?