I'm experiencing following symptoms with Diigo Toolbar for IE7.
#1. whenever I open a new tab, IE7 loses focus for about a second. You can see this by watching IE's titlebar. #2. opening new tab is slow. (because of #1) #3. Whenever I open a link in new tab, IE7 loses focus.
I disabled all add-ons except Diigo Toolbar, still the same symptom. If Diigo Toolbar is enabled but not displayed, the symptoms dissapear.
My guess is that IE7 loses focus because Diigo Toolbar is getting focus.
1. click on diigo bookmarklet
2. click on the Sticky Note button
3. click on the text box
the third step can be eliminated if the text caret is already on the text box.
http://img211.imageshack.us/my.php?image=diigoletkd0.png