The original theatrical subs on Jedi is very different from what was on the DC laserdisc release and the original subs don't contain any of those misspellings mentioned. Everything from timings to line breaks are different. I did a re-creation of them some time ago for d_j's DVD using the footage that appear in the documentary "Empire of Dreams" and a theatrical bootleg Video_Collector sent me, Treadwell have since then uploaded a much better quality bootleg and Puggo's 16mm is another one, so there is plenty of references out there.

Mindofone, on this page: http://originaltrilogy.com/forum/topic.cfm/Greedo-Jabba-subtitles-theatrical-placement-and-fonts/topic/11463/
you can see how the original subtitles looked, I found Trade Gothic Bold to be a close match but only close. The subs on Jedi differ slightly from the subs in the first film.