The ManagingWebs form in CairoRelease will happily let me create webs of greater than 10 characters long, contrary to the description against the field. Is the text outdated or is the validation not doing it's job?
There's definitely something flaky about the validation, though: if I try to generate a web that's more than 10 characters long and is a WikiWord I get an "oops" message (with misleading text that outlines the old rules for webnaming before WebNameAsWikiName), but if the new name is either less than 10 characters or is not a WikiWord the validation allows the creation of the web.