Operating system and graphics card
Windows 7 Ultimate
GeForce GTX 480
Broken: 2.76 48f7dd6
Short description of error
Blender Player stutters when navigating rendered image sequence (PNG, TIF tested) by dragging with the left mouse on the screen.
Exact steps for others to reproduce the error
Play rendered image sequence (not video file) by pressing Ctrl+F11 or from the command prompt using "blender -a [path to first image in the sequence]"
When in play mode - the playback is fine.
When in "drag" mode the player lags while displaying frames. Clicking on different points in the screen loads the image frame faster.
This behavior is the same, no matter the time indicator is on or off (by pressing I on the keyboard).