Hmmm... I've been on and off the webmail interface since about the 18th (tracking something, so waiting for confirmation of shipping, then using the link in the email to see where it was). I haven't seen a problem. However, I have seen that in the past - just not lately.
What browser are you using? I'm using Firefox 17.0.1 (and I think my problems were on the other machine which is still using a very old version of Netscape simply because I don't use that machine for web access usually).
I too am using Firefox 17.0.1 so it can't be that. I see a message at bottom LH corner of Firefox that says something about javascipt and argument has lostpassword in it. But nothing lost about password and it eventually works.
Today it was faster to display - about 10sec of blank screen.
I'd suggest trying another web browser just to see if your issue is isolated to Firefox or if it's just a general issue.
Also, if you prefer, you could always use an email client to get your email as well, I know the Cogeco tech support guys can help set that stuff up, got my dad to call them up to help him with his email setup when I couldn't get over to help him myself.