Internet Explorer - Mac
1. On a Classic OS machine, go to Edit | Preferences. On OS X go to Explorer | Preferences.
2. Expand the Receiving Files option on the left if it isn’t already.
3. Click Cookies.
4. In the box that displays all the cookies on the machine, click once to select one, and then press Command-A to select all.
5. Click Delete.
6. Click OK.
Firefox 1.5 - Mac
1. Open Firefox and go to Firefox | Preferences.
2. Click Privacy.
3. View the "Cookies" tab and click the Clear Cookies Now (older versions of Firefox are very similar to these instructions).
Safari 2.x, 3.x
1. Open Safari and go to Safari | Preferences.
2. Click Security.
3. Click Show Cookies.
4. Click Remove All.
To clear your cache for Opera
* Click "File" from the Opera menu bar
* Click "Preferences..." from the "File" menu
* Click the "History and Cache menu"
* Click "Cache"
* Click the "Empty Now" button
* Click ok to close the Preferences menu
There is no harm in clearing cookies (just make sure you know your passwords if you are the type that saves in log in). I'm 99.9% sure this is a cookie related issue and deleting them will solve it.