"...If a yellow warning icon appears in the Blue Iris status bar, click on the "stopwatch" icon in the toolbar to view these error messages..."
"...The yellow caution icon may be displayed on your camera window when there is a mismatch between the camera's frame rate and the maximum frame rate setting on this page. By default, the software will automatically increase the maximum frame rate (FPS) setting in order to properly handle all frames delivered by your cameras. If you need to throttle the number of FPS from a camera, the best way to do that is by using the camera's own web interface to adjust the number of frames that it generates. Not all cameras may be so controlled, however, and in this case you may use the "framerate limiting compatibility mode" option shown below..."