Youd be correct, UTF8 in either the text being matched or the pattern causes UTF8 semantics to apply to the whole regex. A good example of oddness this causes is the differing handling of the german sharp S. If you use extended ascii a case insensitive pattern will not match 'ss' if you use utf8 it will. :-)

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$world=~s/war/peace/g

In reply to Re^3: inconsistency in whitespace handling by demerphq
in thread inconsistency in whitespace handling by Skeeve

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