Has anyone else ever run into this problem before? Sometimes, no method of deleting keyframes will work on certain keyframes. Clicking the diamond when the play head is on the diamond doesn't work, nor does right-clicking on the keyframe and selecting "Remove Keyframe". Other keyframes on the same PiP timeline delete with no problem. Usually I have to delete the entire clip and start the PiP Designer again.

Russell1967 System specs: Windows 7 Professional x64; Gigabyte Z77-DS3H motherboard with i5-3579K 3.8Ghz processor with 32GB RAM; Zotac GTX 760 w/4GB; 1xWestern Digital 1TB 10,000RPM HD; 1x Samsung 840 Pro SSD System Drive