Merging on a Mac
If you've ever tried to merge two folders together on OSX then you'll be familiar with this problem. On Windows when you drag a folder into another it gives you the option to replace or merge any identically named files or folders. This option isn't present on OSX, instead it only gives you the option to replace.
A great example of a need for merge instead of replace is when using Subversion, as simply replacing a folder erases all of the hidden .svn folders. There are several options available to you to achieve a merge, including using Terminal or third party apps. However, the nicest solution comes in the form of a handy Automator plugin which gives you a right-click menu option to merge two folders together - simple!
Hopefully Apple will fix this omission from OSX in the upcoming release of Snow Leopard but until then this should be really useful!
If you've never used Automator before it's an extremely useful app that comes with OSX that will perform mundance actions for you. It's programmable and you can download loads of existing plugins for it.
Good find Matt, solved the problem of keeping the wordpress up to date in sub version!
OSX can’t merge folders? Wow… fail.