The following is from BBC web site.

Notice anything different? Find out about changes to the BBC News website

What is the special function of "about" in here? Shall we not have the same meaning if we just say "Find out the changes to ...?"

Your comments will be appreciated.

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Comments  (Page 2) 
I'm not sure if my usage here might be atypical. To me, "Find out the changes to our website" is acceptable (though "about" certainly makes the sentence smoother, and, per CJ, "find out" followed directly by a noun is often plain wrong).

I notice the following surprising results at Google Book Search:

613 on "find out the changes"

134 on "find out about the changes"

Usage is always interesting and often surprising. On an open-parametered Google search I get:

118,000 for "find out the changes"

137,000 for "find out about the changes"

Like Jim, I still feel the first phrase to be odd, and like Jim, I cannot find my way to any clear, non-anecdotal guideline.

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In the end of the day, I have found out that this thread is quite interesting!
The usual interpretations:

I have found out that this thread is quite interesting!-- I have discovered through research, not my own feeling, that it is interesting.

I have found that this thread is quite interesting!-- I have determined/decided through my own feeling that it is interesting.
Thanks MM. How about this?

I have found this thread to be quite interesing.

Does this sentence convey the same meaning as "I have found that this thread is quite interesting!"?
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Yes, it does, Abil.
Thanks MM.