Well, this is a minor bug, but since we're taking this version to the absolute limit:
If Forum Code is OFF there should be less options/buttons in post.asp: The Format buttons and selectboxes shouldn't be displayed, neither should the Mode selectbox or even the Preview button, though that last one should be displayed when HTML is ON (even when Forum Code if OFF), but when both are OFF there is no use for it.
All these are used to add Forum Code to the message and when Forum Code is disabled that makes no sence. It also enables people to have a much less "complex" postingscreen when they don't want their users to use Forum Code anyway.
We discussed this awhile back and I even posted a link to a modified post.asp that wouldn't show the post buttons or mode dropdown when Forum Code was off. I also had added an Admin Option to turn on/off the post buttons and mode dropdown so that Forum Code could be on but the Post Buttons and Mode button would not be shown. But they never got implemented.