Anonymous users can't see their filled PDF, even if admibn gives them the right to

In fillpdf.module, line 319, the following line is supposed to check if current user has the right to access the pdf file :

if (!($user->uid && (user_access('access own webform submissions') || user_access('access webform results') || user_access('access webform submissions'))))

The problem is that Anonymous user has the uid 0, so $user->uid will be considered as false by PHP, so the whole boolean expression is always false for anonymous users.
Since I really can't see any utility to check if $user->uid has a value, I fixed the bug by simply removing it :

if (!(user_access('access own webform submissions') || user_access('access webform results') || user_access('access webform submissions')))

See the attached patch below