Upgraded from Subversion 1.4.4 to 1.4.5

Not a hitch. Amazing.

Here were my steps:

1. Download and extract the latest binary with bindings that matches your Apache version: (svn-win32-1.4.5.zip) for me.
2. Stop the Apache Windows Service.
3. Stop the Subversion Windows Service (svnserve).
4. Copy the contents of each sub folder from the extracted zip file (svn-win32-1.4.5.zip) over the location of the corresponding sub folder of your SVN installation location.
5. ** See UPDATE below for a step I originally missed
   
6. Restart the svnserve Windows Service.
7. Restart the Apache Windows Service.
8. Test.
9. If you use TSVN, upgrade it too.
   

Viola!

**
[UPDATED: 2007-09-28]

Be sure to copy the following from your Subversion bin folder (C:\Program Files\Subversion\bin) to the Apache modules folder (C:\Program Files\Apache Software Foundation\Apache2.2\modules):

libdb44.dll
mod_dav_svn.so
mod_authz_svn.so

If you don't, and you view your respositories via a browser using Apache, you'll see the wrong version in the footer.

[SideNote]
I couldn't remember what the Apache Windows Service was named. Here is some handy command line goodness:

C:\>sc query type= service | grep -i apache
SERVICE_NAME: Apache2
DISPLAY_NAME: Apache2