If you click on an new edit section link with a nosummary option the summary (which will be used as topic) is not displayed.
But if the edit page is reloaded by using the preview button or a not autoconfirmed user has to fill out the captcha the summary line is displayed again. I think the reloaded edit page should also hide the summary/topic line.
Version: unspecified
Severity: enhancement
URL: action=edit§ion=new&nosummary=1