If you use the Twitter client/service TweetDeck, you should log out and log back in to block a security vulnerability that quickly spiraled out of control last week, resulting in a torrent of out-of-control retweets. Twitter took TweetDeck offline until the bug could be fixed, but all should be well now. follow link
Enabling Auto Spelling Correction in Snow Leopard
In Snow Leopard, the automatic spelling correction in applications is not usually activated by default. To turn it on, make sure the cursor's insertion point is somewhere where text can be entered, and either choose Edit > Spelling and Grammar > Correct Spelling Automatically or, if the Edit menu's submenu doesn't have what you need, Control-click where you're typing and choose Spelling and Grammar > Correct Spelling Automatically from the contextual menu that appears. The latter approach is particularly likely to be necessary in Safari and other WebKit-based applications, like Mailplane.
All Hands off TweetDeck