I noticed that in the last week or two that inline IMG pics are being resized smaller, with a bar at the top you can click on to open it in a new window at full size.

Its a new feature that you can turn on or off.
To change it-

open User Control Pane (User CP).
Edit Options.
down near the bottom are width and height limits.
Enter 0 to turn it off. Enter blanks to accept default of 400x600

while you are there -----
note that at the top of the "thread display options", you can turn off Avatars and Signatures.