Preview on hover

I use the preview on hover feature a lot. After updating to 1.4, this feature is not the default option, which is ok because I can still turn it on in the Labs. I depend on this feature to preview the images pointed by the pdf anchors. In 1.3, the images show below the source information (pdf>page#), which works perfectly. But in 1.4 the images show to the right of the source, leaving a big blank area on the left (right below the source information). Is it possible to show the image below the source information?