won't filter numbers unless its instructed to do so. If those 4 missing characters form a profanity that has been set in as filtered words, it will block them. Its not real bright when it comes to figuring out if it's just text or part of an address.
Try renaming the pic and uploading it to photobucket.
I tested a hunch that the missing part was a cuss word. I got a moved or deleted error from photobucket.