Not at all. At least, not if you are interested in epistemology. In fact, one common definition of knowledge is "justified true belief." Cf http://en.wikipedia.org/wiki/Justified_true_belief
A) "Justified true belief" as the criterion for knowledge is not common in epistemology, contra the initial comment;
b) "Scientific belief" is an odd term given that you either have "knowledge" or you have "false beliefs" based on best available science.
I hope not. The definition of "scientific belief" is belief in something supported by a scientific method. Put another way formally and rigorously established based on agreed axioms.
Being a scientist doesn't make your belief that you're Imhotep reincarnated a scientific belief.
How many examples on the OP did you read? How many of those examples were supported by a scientific method? (Probably some, but not all.) I think my definition better suits the context, quibbling aside.
Personally I think it would be truly naive to imagine that we now have what you call "knowledge" as opposed to having in science the best (based on consensus) available description of the universe. If you wish to call the standard model "false belief" then I can go with that but it seems a bit overly fussy.
We should understand that we take our axioms and build on them and measure against them but that we need to adjust those axioms as evidence comes to light.
Axioms, many scientist fail to realise, are beliefs without scientific justification. Not only is physics built on them but the mathematics we use to build our physics and the logic that we use to support our mathematics are built on them too. What is more Godel shows us that we can't prove that logic to be complete and consistent from within.
Yes Pyrrho is my hero but I think Carneades went a bit far.
Practically however the NFP formulation of JTB (http://en.wikipedia.org/wiki/Justified_true_belief) leaves us without a usable word for "knowledge".
At least, many of those "beliefs" weren't actually beliefs, but scientific theories that worked very well but were later improved. It's the case of Newtonian gravitational force.