Grouped navigation shifts the modal box just a little bit in Safari

[nilesh]

I have a group of image links to which I am applying Top-Up. Here is the code I am using:

TopUp.addPresets({
    "div#some-name div.thumbs a": {
      layout: "quicklook",
      modal: 1,
      title: "Some Name: {alt} ({current} of {total})",
      group: "some-name-group",
      readAltText: 1,
      shaded: 1
   }
});

I have not done any modifications anywhere else. In Safari 4, when I navigate through the images, the modal window shifts to the right and top by about 15 pixels for every image. All images are of the same size. But the window keeps on shifting as I browse, till it reaches the top right corner of the browser viewport.

Any clues?

[nerdynick]

This also appears to happen in all other browsers as of the 1.7.2 release.