I have an odd little regular expression \B.* that seems to generate inconsistent behavior between CL-PPCRE and other regular expression engines that I've tried it with. Using CL-PPCRE: CL-USER> (cl-ppcre::scan "\\B.*" "foo bar baz") NIL This matches in Perl, PPCRE, and RE2. Am I missing something, or should CL-PPCRE be matching this as well? Oddly enough, change * to + leads CL-PPCRE to match: CL-USER> (cl-ppcre::scan "\\B.+" "foo bar baz") 1 11 #() #() It seems like + matching implies that * should as well... Thanks, Moshe