If this doesn't work, try e-mailing me at cannon@inmed.univ-mrs.fr. You can also use this form from within Catacomb: select report from the file menu.
Most fields are optional, but it is useful if you fill them in.
In particular do set the type of submission field so it gets put in the right place.
For codevelopers, the confidential option will cause your submission and our response to go on a password protected part of the Web site with the password you specify. This is mainly to prevent inadvertent pre-publication of things to be published later.