Since the latest version of the Midori web browser isn't packaged and available on repositories (and I can't wrap my head around pbuilder or any other way to package it up), here's a small guide on how to build the latest version and install it. I will keep this post as up to date as I possibly can, as new tarballs of Midori are released.
EDIT 12/17/2015- updated for Midori 0.5.11... same steps apply
0. The very first thing to do is purge the existing, crash-tastic, out-of-date, original build of Midori already on your system if you haven't already. If you have compiled your own build in the past, just skip this step. Step 7 will install your new compile over the old one.
sudo apt-get purge midori
1. Download the Midori 0.5.11 source.
wget http://www.midori-browser.org/downloads ... l_.tar.bz2
2. Create a new directory for the source code (I use "build") and extract the source into this directory.
mv midori_0.5.11_all_.tar.bz2 ~/build/midori_0.5.11_all_.tar.bz2
tar -xvf midori_0.5.11_all_.tar.bz2
3. Install Midori dependancies.
sudo apt-get build-dep midori
4. Install libsoup-gnome2.4-dev, cmake, and libgcr-3-dev (if you don't have that last one)
sudo apt-get install libsoup-gnome2.4-dev cmake libgcr-3-dev
5. Enter the source directory and configure the build. I can never get Zeitgeist integration to build/work so I disable it.
6. Type make to build.
7. Wait until the build finishes (it may take a while), then install the build.
sudo make install
8. Before running your build, you must point it to the libraries it needs. Create a new file.
sudo nano /etc/ld.so.conf.d/midori.conf
It's contents should be as follows:
Hit Control+X, then y to save the file.
9. Type sudo ldconfig and enter.
10. You are now ready to run Midori 0.5.11!
(or just use the menu)