Ok that means that you have multiple problems occurring.
I believe the first problem is either going to be very similar to what this person discovered in this forum topic: http://forum.ait-pro.com/forums/topic/security-log-file-size-exceeds-500kb-every-day/#post-3318 Or something simple like the image files do not exist or are not in the location|folder that the links are pointing too.
The second problem is that whatever method is being used to get these fonts|images is triggering a 403 error. BPS logs all 403 errors whether or not the 403 errors are things that BPS is blocking. Or in other words, the 403 errors may be caused by either a security measure that is installed|configured on your server itself or something that BPS is specifically blocking. In this case it appears that BPS is blocking something about whatever method is being used to get these fonts|images.
In order to be able to get some clues I would need to view your website’s Source Code. Either post a link to your website in this forum topic or if you do not want your website URL posted here then email it to info at ait-pro dot com.