PN Statistics are not counted for users that have a least EDIT rights. So if the user is allowed to EDIT, ADD, DELETE or ADMIN for any module, the visits are not counted.
Before postguestbook 0.3 the ADD Permission was needed to post a new guestbook entry. So by adding this permission to all users the visits are not counted anymore.
Starting with postguestbook 0.3 the needed Permission to sign the guestbook was changed to COMMENT and this bug should be fixed.
The bug resulted from an uncomplete understandig of the Rogue Permission System. Sorry for that.
There are some reports about smarty not beeing able to read the templates. Still searching for the solution.
Smarty (2.2.0) needs a php version >= 4.0.6. If you encounter this problem please check your php version.
There a some problems regarding to Safe Mode. Starting with version 0.4 of PostGuestbook the compiled templates are not stored in subdirectories (of tempaltes_c) anymore. Because there are various different Safe Mode setups this doesn't fix all these problems. So styles can now be written in pure php - smarty is not needed for these styles.