Menus working fine in NS6 and IE5. Successfully separated arrays into several files (still have problem if glued back together though!). Got two menus on the page (still have problem if kill one though!)....
NS4.79 symptoms -
(2 and 3 documented elsewhere, but couldn't see fixes)
(4 and 5 are the critical ones!)
1. main menus load OK
2. any transparent bg items black blocks
3. the mouseover colour changes don't revert (though sometimes do when mouse is removed from menu altogether. Pointer images sometimes disappear and don't come back (can't see a pattern tho).
4. on every mouseover, javascript error generated: "SwapIM[el] has no properties" at line 61 in mmenu.js
5. the submenus don't appear at all
The script/sample I downloaded ('headers as dividers') works OK in NS4.79, but attempts to simplify my settings back to something close to what I started with are still generating the same errors.
Has anyone else had this error message/behaviour? It's probably something really trivial - I've been staring at this too long...

Thanks, Jon
(Sorry not to post link to page - it's got sensitive stuff on it right now. If essential to debug this, let me know and I'll edit it down!)