Bug with user name

Hi,
I was very curious with zoho creator and so I opened an account to try.
My username was olivier.rames, I was unable to open the new apps I had just created; an error message said that it couldn't find my page.
Then I tried to register with olivier_rames and this time it worked flawlessly.
Don't you have an issue with usernames with a "." in ?

o.rames