Just to let you know that I have put a modified version of the Lua 5.0 alpha reference manual on the following website
The content is exactly the same as the original, but the file is extensively bookmarked and the table-of-contents entries and references between chapters are links. Also, the Acrobat Reader page numbers match those at the bottom of the pages. I think the manual is somewhat easier to navigate with these additions.
The Magic Acrobat Fairy.