Dear all, For my opinion, the problem is from Lingoes.

If you had tried, you would see that Lingoes text capture has not worked with many programs like Opera, Safari, Chrome, MS Office One note etc. The point here is that, for a particular program Lingoes developers need to develop a different text capture mechanism.

The latest version of Lingoes is 2.7.1 which is released in Aug 23, 2010 - quite long time ago. And in this version, Lingoes is only said to be "Support cursor translator more fluently in Firefox 3". you can check it here: http://lingoes.net/

To solve the text capture problem with FF4.0, I have a suggestion for you: Use double-click text selection instead.

Open Lingoes, open "Configuration", go to "Text Capture", and tick on "For Double clicking" in the "Translate selected text" section. You should also untick the "For text selection" feature because this will cause a Lingoes window appears each time you select text - this is a bit inconvenient.

Then, activate the "Translate selected text" by right click the Lingoes icon in the system tray and tick "Translate selected text"

From now on, each time you wanna lookup for a single word in FF4.0 (or in MS Office Onenote, Chrome etc), just double-click on this word!

Have fun with FF4.0!