I'm trying to access a forum that requires a user name and password. When I do it on my mac it tells me the password is incorrect but when I do it on my iPad, I can access it without any problem. I can confirm the username and password are the same

Question

I am trying to access a forum for which you need a username and password but it keeps telling me the username/password i've entered are incorrect.  Bizarrely, when I enter the same username/password combination on my iPad, it grants access without any problem. 
What could be causing this, is it an issue with cookies, caches or similar.  How can I resolve it?  The forum administrator is at a loss as to what the problem is.

Answer 1

Try the following steps in Safari to see if they help:
1) First try clearing the Safari cache.  To do this pull down the Safari menu and select 'Empty cache...', then try logging into the site again.
2) If the issue continues then reset Safari by pulling down the Safari menu and select'Reset Safari...'. You will be presented with a list of items that can be reset. I suggest selecting the 'Reset saved names and passwords', and 'Remove all website data' options at a minimum.
Here is a list of the options and what they do. I pulled it from the Safari help page.
Clear history:
Clears the list of webpages you viewed.
Reset Top Sites:
Clears any changes you made to Top Sites, such as adding or pinning sites. If you also clear your history, your Top Sites page reverts to showing the webpage previews displayed when you first installed Safari.
Remove all webpage preview images:
Clears any thumbnail images Safari saved of webpages you viewed.
Clear the Downloads window:
Clears the list of files you downloaded from websites. Only the names are removed; the files themselves are still on your disk until you remove them.
Remove all website icons:
Removes website icons, which are small graphics that help identify sites on the Internet. You see them in the Safari address field and bookmarks list, and other places. These icons are stored on your computer.
Remove saved names and passwords:
Removes user names and passwords that Safari automatically fills in at websites that require them (if the AutoFill feature is turned on).
Remove other AutoFill form text:
Removes some personal information, such as telephone numbers, that Safari uses to automatically fill in forms on webpages (if the AutoFill feature is turned on). Removing AutoFill information does not remove information from your address book.
Close all Safari windows:
If you don’t close all Safari windows, someone could use the Back and Forward buttons to view the webpages you visited.
Reset all location warnings:
Clears any information websites saved about your location.
Remove all website data:
Removes cookies, tracking information, and other data that websites stored on your computer.