Not exactly, but if we are talking of the left column in a PC browser, it's Flash and may be corrupted by several issues.
Try one or more of the following:
- close all browser windows and re-open,
- shut down the PC and restart,
- don't use too many WGT windows,
- check if your Flash version is up-to-date (and update),
- check if your browser is up-to-date (and update).