urls stop working

It's maybe just cached in your browser? Empty your cache or try another browser.

unfortunately it's not that simple (i've tried other browsers (and computers)).  Here's a link to the url in question - www.4x4earth.com.au/tracklist

It's not the first time this has happened... it's happened quite a bit, and i've had to create a new alias's, but that's not really an option this time.
I've duplicated the alias as, www.4x4earth.com.au/tracklisttest so users can still get to the page until this is fixed, but I need to know why sef advance does this... ?

thanks
Gavan

Any ideas?  I've had this happen on two different sites I run.

Do you use caching in SEF Advance?

No, I haven't enabled that.

cheers,
Gav

Please send the admin password on mail and explain exactly how to replicate the problem and I will take a look.