Sapphire 3763,
Which version of Chrome OS are you on, and which channel are you on? You can find this information out by going to:
- Click on the lower right-hand corner of your screen and choose the Settings gear icon
- Choose "About Chrome OS" on the bottom of the left-hand side of the window
- Then look for the Version number with anything it says after this number
I am on the beta channel and had this happen to me this morning on mine, but haven't spent time to work through a fix yet. One thing to try is to check all of your flags that you have turned on by going to your browser and typing in chrome://flags then make sure that the flags that aren't working or that you no longer need or are not using are turned off.
Also, I wouldn't suggest shaking your Chromebook. When this happened to me, I refreshed the webpage and it worked fine after that.
Jowe