Suggestions for the "Template to use" field expand to the full width of the page when you hover over them on IE9

Steps to reproduce:

• Hover over Wiki and click on "Administer Wiki"
• Click on Templates
• Write a "Template Provider" name in the "Page" field
• Click on "Create"
• Start writing a name in the "Template to use" field (for example write "test")
• Suggestions will appear; Hover over them

I've attached screenshots.