Hi!
The *tentative* ISO for the Tails 1.5.1 emergency release [1] is available:
http://dl.amnesia.boum.org/tails/stable/tails-i386-1.5.1/
Please test it wildly!
Note that this is *not* the final release yet: if we discover any issue,
we may have to rebuild the ISO, so beware not to get confused. If any
such rebuild happens, I'll notify this mailing list.
Cheers!
[1] The reason for this emergency release is primarily:
https://www.mozilla.org/en-US/security/advisories/mfsa2015-94/