Josh,

I've had LCDs do funny things when glitches get on the Enable
line. The last instance was the power line for a solenoid running
next to it. I've not noticed problems with over-long leads but that
might just be because most projects I do are pretty quiet. An RC
filter would be OK, as long as you meet the timing specs. LCD
timing errors are when intervals are too short, so some lengthening
won't do any harm. Even a stiffer pull-up than the LCD's on-board
one might do on its own

Enable is the single most important line, as it is the only one that
controls data writing, which is why every other line can be multi-
plexed quite successfully. If you aren't seeing noise on the other
lines then Rs and Cs probably aren't necessary. It won't do any
harm to add filters, but it would be fairly unusual, and if possible
keep the cable away from any likely sources of noise, such as
relays, switching semis and so on

Joe
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