Arrived- got login page. Presumably you're going for a private site; otherwise you need to put a compelling reason for your user to bother with the rigmarole of registering
Registered. Didn't fill the date in. Got a error page with all the fields blank...you might want to consider a cookie to take the filled-in values to the error page. It's a bit of a pisser having to fill everything out again if you get 1 bit wrong.
Reregistered. Gave year of birth as 1901. Error checking? I didn't bother trying injection attacks on your form, but you should sanitise the input.
Success! Got sent to the home page. 2 links - home and test (I filled everything out as 'tester', by the way, so the 'test' must be yours; or limited to 4 chrs). I clicked on home and it refreshed.
I clicked on test and got:
Not Found
The requested URL /test.php was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request
I'm using opera 10 with javascript on and accepting cookies.