Quote by mbrmbrg
This post rather befuddled me, b/c I learned from that file and never had a problem...
Then I saw it
although [ t e x ]...[ / t e x ] does appear twice., [ t e x ]...[ \ t e x ] appears once.
It's all in what you look for !
BTW, can anyone explain the itex [itex]\frac{7 days}{1 week}[/itex] vs tex [tex]\frac{7 days}{1 week}[/tex] deal?

i guess it is better for articles to be consistent. just a thought. Anyway, thanks!