Input format not used in popup

I've run into the following bug:

When entering the contents for the popup, one can use input format, for example Full HTML or PHP code. When displaying the popup, however, the input format is not tolerated.

The problem seems to be very simple to resolve: in popup_onload.module, replace line 179 with the following:

'html' => check_markup($popup_onload->body, $popup_onload->format);

and that should be enought.