those are fun to squash when you can find them... sometimes stuff is written RIGHT, and has those bugs... just cause you didnt predict that you'd be doing things differently than when you first wrote the buggy section. then its hard to find them, cause when you look at them you're like 'wtf this shouldn be happening, there is no good reason, everything works'... then you cry to yourself for 2 days being like WTF is going on... then you remember what you did a week before and are like 'omg i'm retarded, how did i not see that'...
btw, are you gonna go for an active lighting system? if so from the start (while its still ez) or later on?
-scheherazade