Sieve test string and case sensitivity

Hello,

I have found that Pigeonhole comes with an extensive testsuite against the Sieve RFCs. As I am working on a personal Sieve project I decided to run my tool on this testsuite and it stumbled on "Basic assignment: string test failed"1.

Pigeonhole defaults to comparator "i;octet"2 for the string test. But Sieve says that the default comparator should be "i;ascii-casemap"3. Did I miss some other part of the standard? Can you point me in the right direction?

Thank you, Kim Minh.