Now (October 2013) is "hreflang" implemented ?

FYI: in the meantime "canonical" tag is deprecated:
googlewebmastercentral.blogspot.co.uk/20...lingual-content.html


Regards.
J

Can some one help me, please ?

In addition to Problem 2, i add this URL, here we have Joomla 500 page error ("View" not existing)

www.tfautomation.it/index.php?option=com...=XXXXXXXXX&id=48

Hi,
i have recently started to use JoomSEF and i can say it's really a great product.

I write this post because i can't completly understand how to manage all 404 error cases.
I'm working on website: www.tfautomation.it
When i try to manage 404 error page i have found two different case of failure:

Problem 1)
If a write these urls then 404 works fine:
a) www.tfautomation.it/not_existing_page
b) www.tfautomation.it/not_exist_page.htm
c) www.tfautomation.it/not_exist_page.html
d) www.tfautomation.it/not_exist_page.php

but if a insert a different page extension than ".htm", ".html", ".php", example:
d) www.tfautomation.it/not_exist_page.abc
then i get classic (& horrid) web server error page, see here:
jabber2033.interfree.it/web_post/error_1.gif

Is possible by JoomSEF to manage this error and redirect to 404 custom page?
If yes, how can i do it ?



Problem 2)
If i try to address (by a non-SEO url) a not existing article (or component),
example see these url:
1) www.tfautomation.it/index.php?option=com...ticle&id=9999999
2) www.tfautomation.it/index.php?option=com...ew=article&id=48
i get this error:
jabber2033.interfree.it/web_post/error_2.gif

How can i resolve it ?

I feel depressed :(

Thank you in advance,
Best regards,
J