If you keep posting on the two-week periods then your photos will be displayed after 16 August afternoon when you will become Jr. Member (42 Activity). Here is the announcement from theymos about this 'issue':
Due to abuse, newbie-posted embedded images are now disabled on these pages:
- Topic display
- Recent posts / patrol
- Previews
They're not currently hidden in PMs or on some other pages (like a user's "show posts" page), though I might change that later if it seems necessary.
Disabled images get transformed into links automatically. When the poster becomes a Jr member, the images that he tried to post previously will automatically be re-enabled (though there might be a few minutes of delay).
This extends to all past posts as well as future ones.