Using Safari and Chrome, Confluence editor moves table cells to the right when strikethrough is clicked after dragging the cell content to the right

Here are the following steps on how to reproduce this bug:

1. Create a new page in any space
2. Edit the page
3. Add in a small table (4×3 in below)
4. Fill in some text in the table cells. See attached screen shot:
   
5. Click-and-drag-it-to-the-right by selecting two rightmost cells of any row. See below:
   
6. Apply Strikethrough and it will look something like:
   
7. This causes the cells to move on that row one step to the right. This affects only the editor. If page is saved, it will still show up correctly.

This problem does not only occur when applying Strikethrough, but it also happens when applying on Bold, Italic, Underline, Subscript, Superscript, and Monospace.

This problem only happens in Safari browser (Version 5.1.2 (6534.52.7)) and Chrome (17.0.963.79).

Since the table cells do not move to the right in Firefox 10.0.2 and also in IE 8, the only workaround would be to switch browser temporarily if this problem turns out to be a show-stopper.