Exetel websites keep asking for login

[TheJMan]

After changing IP addresses today, I have not been able to log in to exetel websites (member services)

the 'old' site just keeps asking for password every time I click on a link

MyExetel won't let me get past the Member Login page (but it's not telling me my password is incorrect)

This is only happening in FIreFox - Chrome seems to be OK

I know it's most likely an issue with my browser, but I have no idea what has triggered this bizarre behaviour.

Clues welcome

[TheJMan]

bizarre

a whole bunch of exetel related sites got thrown into my "block cookies" exception list

some bad juju is happening