Hello, I'm using Win32 grep with the Perl regular expressions, I updated from the grep version 2.5.1 to 2.5.1a and I get a different result with the newer version: Example: SourceFile.txt LineA LineB LineC LineD RegexFíle.txt (?:LineA)|(?:Line(?:(B|C|D))) Command: grep.exe -P -U -i -f RegexFile.txt SourceFile.txt Result with grep version 2.5.1: LineA LineB LineC LineD Result with grep version 2.5.1a: LineA LineD I attatch both versions to see which dll I'm using. Do you know about this behavior? Is a fix planned? Best regards Roman Berger
