OK, just found out that in Chrome if you hit CTRL + F5 while on a page giving the error it will fix it!
So I don't have to repet it woohoo :D
After a update of spectrum some time you have to login, and some time you need to reload the page...
and F5 only reload cache from your harddisk if that don't match the updated page you get validation error..
So as Stoutman said CTRL + F5 to force reload on some browser SHIFT+ F5 works to..
this is the trick to force a browser to reload page from scratch as in download the hole page not just the changes.
CHEERS!
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