What operating system are you working with? It's not a Mac with a Retina display is it?
Some people -- particularly on Macs -- are experiencing the "runaway timeline" you describe.
No, It's a Win 7 PC, with a Gigabyte GA-Z77X-UD3H motherboard, Intel i7 3770 processor, 16GB DDR3 Kingston memory, EVGA 512-P3-N871-AR GeForce 9800 GTX+ graphics card and ViewSoni LCD display.
I'm sorry, I have no solution for you. I'm running this program on a Windows 7 64-bit machine and I'm not seeing behavior anything like this. Maybe someone else knows of it and/or a solution.
Check the nvidia downloads site to see if the current graphics driver (latest version is 320.18 dated 23rd May) is newer than your installed version. If not update it and see if that helps.
Also check that you haven't got any accelerator actions assigned in your mouse driver software.
Insanity is hereditary, you get it from your children.
Thank you for the suggestions, but alas, my problem remains. I have the latest NVIIA drivers and upgraded to the latest mouse drivers. No accelerator actions are assigned.