Uzbl

Middle clicking a link truncates the SELECTED_URI for the new window. A "&" character and anything after it, will not be passed to the URI for the new window, causing a 404 error, or a completely different page than expected. This problem does not occur with webkit's builtin for opening a link in a new window, when right clicking and picking "Open Link In New Window". This is specific to middle clicking links with the examples in the uzbl example config:

set load_from_xclip = sh 'echo "uri $(xclip -o)" > $4'
set open_new_window = sh 'uzbl-browser -u \@SELECTED_URI'
@bind <Button2> = @jsh if(get("SELECTED_URI")) { run("\@open_new_window"); } else { run("\\\@load_from_xclip"); }

This can be reproduced by middle clicking one of your bookmark links on http://www.google.com/bookmarks