rxvt-unicode + tmux do italic instead of reverse

When using rxvt-unicode and tmux, I found that rxvt-unicode shows italic instead of reverse color when I search.

Italic

Reverse

I followed the setting in the article below:

http://sourceforge.net/mailarchive/forum.php?thread_name=20110812111030.GH13508%40plenz.com&forum_name=tmux-users

Modify ~/.tmux.conf and add the line to solve my problem.

set -g terminal-overrides 'rxvt-unicode*:sitm@'

rxvt-unicode - not to select trailing blanks in vim

Everytime I do mouse selection in my vim (run in rxvt-unicode) and paste the content to another place, I will select all trailing blanks in every line. It's a very annoying problem.

Finally I found the solution in

http://www.reddit.com/r/emacs/comments/1ox5pf/why_fill_the_empty_space_with_spaces/

I followed the article and added the following options in my ~/.Xdefault:

URxvt.perl-ext-common: default,selection-autotransform
URxvt.selection-autotransform.0: s/ +$//gm 

It removes trailing blanks by perl and everything works as I want now. Thanks for this article!