Recently I got a new MacBook Pro with OSX 10.6.2 installed on it, previously I used Windows XP & Vista, so coming from Vista to Mac has been a bit of a learning curve. I often look for the features common to the PC and can't find them on the Mac. They are there usually there but usually I'm looking in the wrong spot.
In New Zealand we use 'British English' the Mac comes setup with 'US English' as you would expect. I had an expectation that when I setup the Mac with the New Zealand time zone and date time settings that the spelling would also be changed to the format we use in New Zealand.
But alas no, the time I find this most annoying is writing emails in the Mail application, there are only a few differences between the two spell checking dictionaries but enough to make typos in your emails.
I have since found how to change the spelling, it is in System Preferences > Language & Text > Text, a global spell checking setting, it makes sense when you think about it. I look back now and had been confused by the fact that most Windows programs have there own spelling checkers and I could not find the Mail application's spell checking preference. To make sure the setting changed I restarted the Mail application.
Another common situation is you want to write an email in a second language. To spell check your email in a different language select in the menu Edit > Spelling and Grammar > Show Spelling and Grammar
. Its quite a pain to go into the System Preferences or even navigate the menu each time you want to change to say French, so luckily there is a keyboard shortcut Command : unfortunately after that I had to use the mouse to select the language drop down but at least you can change it.
It seems obvious now, as always its best to venture in new situations without assumptions.