WARNING: Hard link count is wrong for /proc

Dear friends,
Do you have any idea about the following error message that I get during invoking "find" command?

find: WARNING: Hard link count is wrong for /proc:
this may be a bug in your filesystem driver.
Automatically turning on find's -noleaf option.
Earlier results may have failed to include directories
that should have been searche

I don't know, but I'll give you a tip of advice: you won't find any homework or files that you need in /proc