No post 'preview' in Opera

[megamaced]

When browsing with Firefox or IE, I noticed that I could hover my mouse over a post to get a preview of the text inside. When I try this in Opera, it just displays the 'URL address'. Is there any reason for this, and is it too difficult to implement?

 

[Sniper]

maybe its something to do with Opera, rather than the HTML code? I can't think of a reason as to why it won't show it, hmm, well does Opera support the title tag?

title="this is the preview"