I use Chrome every day and had not seen any problems until yesterday when my toolbar was no longer visible at all in Chrome on this site. For some reason I could not reproduce it on my local machine using Chrome so I had to experiment on the server to find a solution.

I fixed it by commenting this out in /Data/style/jqtoolbar/style.css:

@media only screen and (device-width: 768px) {
div#toolbar, div#toolbarbut { position:static; }

}

this was previously needed for ipad but no longer seems needed in IOS6 so commenting it out or removing it is ok.

Not sure if that is the same culprit for what you were seeing but it might be.

Hope that helps,

Joe