Eric Allman pointed out that the current text says that out of multiple MX records you need to pick one and it should say that they need to be randomized. John will fix this. A limit of 100 seems like an acceptable default. Other mechanisms may prove to be problematic. This entire issue needs to be addressed in detail in another document.
Examples are probably appropriate here.
The group feels that ABNF string literals should always be considered to be case sensitive. When case sensitivity in the grammar is needed it should be done as a concatentation of literals. Dave will fix this. The group believes that digit values need to be specifiable in bases other than 10. Dave will take suggestions and work up a proposal to address this.