And you also have no idea how pleased I am to be wrong.

I had tried that once or twice, was not successful, and research in bootstrap channels led me to believe the system in the CSS_read_me.txt would not work with bootstrap.

I'm now assuming that the code looking for these CSS helpers occurs before anay template manipulation by bootstrap, responsive_cllassic, or a store-bought.

I'm so swamped that I did not take the time to view the docs to 3.6.4. Perhaps the next bootstrap release could include the CSS_readme.txt as a reminder.

THANX, again for the catch. You helped more than one.