Been checking out recent issues around these matters.
I have come across several ways in which your own browser/s might cause issues with these processes.
Ensure your current Favorite/Bookmarks are pointing at the latest correct message board link:
Watch the browser address bar closely as older addresses may redirect to the new one but the process may cause issues with old cookies etc
If in doubt, delete any old Bookmarks/Favorites and set up new ones pointing to the address shown above.
Remember to do this across all browsers on your PC and any sytems/devices that automatically synchronise with your bookmarks/favorites such as mobile phones or tablets/laptops.
Many providers offer toolbars that store your preferences such as Favorites/Bookmarks on the provider server - such as Google and Yahoo.
Again any stored Bookmarks/Favorites remembered on these toolbars may be different to those stored locally within your PC browser settings.
Check the toolbar stored bookmarks/favorites/quick link buttons and if need be delete them and reset them to the correct maccaboard address shown above.
If your browser has a "Saved Password" for the site log-in it may revert to that when you enter your username automatically - whatever you personally enter at the time.
If recent events have had you trying to set new passwords the browser may be reverting to the old one making the log-in fail.
Visit your browser saved passwords - in Firefox for example go:
Tools - Options - Security - if your PC is set to remember passwords the "remember passwords for sites" option will be checked and you can see those sites listed behind the adjacent "Saved Passwords" button.
Delete any listings for the maccaboard and on your next correct password entry the browser will ask if you wish to remember the new password - agree if you still wish to have your password saved in that browser.
Remember this applies individually to each browser you use and you will have to do the same with each - IE, Chrome, Safari etc.
The correct functioning of the message board does mean the setting of cookies on your PC - again old cookies linked to older message board links/usernames/passwords may interfere with the functioning of log-in and general site usage.
Clear any old cookies related to the message board - either clear all or individually - again in Firefox:
Tools - Options - Privacy - provides a link to view and clear individual cookies
Once again this needs to be done across all browsers you might use - IE Google Chrome, Safari.
Users regularly report issues with one browser while being able to use another correctly and some of that can be related to the various "helpful" features of each individual browser as described above.
Unfortunately correcting some of these needs a bit of knowledge and confidence managing your various browser configurations.
But as the data is resident within your own individual PC and your various browsers, sadly this may be the cause of some of your individual log-in issues and resetting the individual configurations may be needed.