The same has happened to me now.
I'm logged in.
If i remove the lines in red above, it shows the image but if i post a reply, i get the same kind of error.
I tried uploading a fresh showimage.php and newreply.php but that didn't work.
It's strange though, i haven't changed anything
Here's the error i get when replying:
Code:
Content visible to verified customers only.
These lines are responsible (again in showimage.php):
Code:
Content visible to verified customers only.