Upgrade to 1.4.7.0, product missing

[firezz]

Hi,

 

I have just upgraded my store to 1.4.7.0 manually from 1.3.6 and once it is done, i am seeing nicely my front page without any problem.

Thing happens when i click to one of the product, it will lead me to the product page

 

http://mydomain.com/product.php?id_product=14

 

And this is just a blank page (except i am able to see sidebar) and empty in the middle .

 

One more thing i noticed, when i add item from my front end.. i see this error :

 

TECHNICAL ERROR: unable to add the product.

 

Details:

Error thrown: [object XMLHttpRequest]

Text status: parsererror

 

 

Can anyone assist in this ? Is it a norm bug upon upgrading ?

thanks