I have observed that the site is not working properly. Previously aces.gov.in used to open with google crome. I have sent an email to aces.servicedesk @ icegate.gov.in (as provided in the help desk tab) mentioning the problem.
Basically the problem is with some parts of the site e.g. login page of service tax. login page of Excise. Other parts are working fine.
I request everybody to drop a mail mentioning the problem to aces.servicedesk @ icegate.gov.in so that the matter may be resolved immediatelly.