too many errors when eerror reporting is dev

Hi,
I am using the latest stable version : 1.6.0.
i changed error reporting in Global Configuration>>Error reporting to development to see all errors and hikashop is reporting errors even in the back-end.

are these errors serious?

What errors do you have ?

Strict standard messages should be ignored. They are not errors.

I am getting too many 'Strict standard message" on my home page, if this is normal it is ok.
thank you.

As I said, these are not errors. It's normal that you get them when you activate the error reporting and you can ignore them.