WD php: Notice: undefined index: attributes & modalframe

The module seems to work okay, but whenever I do anything in drush - clear the cache, enable a module, disable a module, etc - I get this *massive* list of identical error messages. That look like this:

[error] WD php: Notice: Undefined index: attributes in modalframe_menu_menu_link_alter() (line 289 of /srv/www/mysite.com/public_html/sites/all/modules/modalframe_menu/modalframe_menu.module).

and this

[error] WD php: Notice: Undefined index: modalframe in modalframe_menu_menu_link_alter() (line 282 of
/srv/www/mysite.com/public_html/sites/all/modules/modalframe_menu/modalframe_menu.module).

It repeats those two messages about 700 times.

Not kidding - 700 times.

Any idea what's going on?

Any idea what's going on?