Postgresql pain point on ORMs

Is it a breaking changes if Postgresql will make their table and field names case-insensitive? Postgresql table and field cases automatically folded to lowercase hurts badly on ORMs

Use this for the meantime:

public static string ToLowercaseNamingConvention(this string s, bool toLowercase)
{
    if (toLowercase)
    {
        var r = new Regex(@"
        (?<=[A-Z])(?=[A-Z][a-z]) |
         (?<=[^A-Z])(?=[A-Z]) |
         (?<=[A-Za-z])(?=[^A-Za-z])", RegexOptions.IgnorePatternWhitespace);

        return r.Replace(s, "_").ToLower();
    }
    else
        return s;
}

Sample here: http://code.google.com/p/fluent-nhibernate-lowercase-system/source/checkout