If you use Australian or Irish (and perhaps others, but not U.S.) set as your region (using the International prefs panel), and you use Speakable Items, here's a workaround for a subtle bug. When using Speakable Items to hear the current day by speaking "What day is it?," the answer is missing a space. This means you hear something like "It apostrophe s Tuesday 12th July." Although not present in Mac OS 9, I think this bug is in every version of Mac OS X...
Here's how to fix it:
sudo vim /System/Library/Speech/Recognizers/AppleSpeakableItems.\
SpeechRecognizer/Contents/Resources/SpeakableItems.app/Contents/\
Resources/WhatDayIsItSIAction.plist<string>It's </string>Comments (0)
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050712031209363