i will do as mistwalker (at least initially).
i have the first print of the 3rd edition but have just bought 1 player and 1 gm book from moongoose just because i want the last print.
then i will see what will happen, but a pdf of the errata will be good unless the changes will be so intense that i will opt for a new copy of anything.
i already know i will buy them anyway, but i am trying to pass my WIL test at the moment.
the problem will be the result of the effect test they will produce with the new prints, i fear will be a EF40, and my WIL is just 10, that is a mere 5.
impossible unless i roll a very epic string of consecutive eights.
anyway, after a cursory reading of sw and pf version, i am even more fond of the "original" rules.
so ED3rd forever

(as an addition, i will purchase all the adventures they will produce, not matter wich rule system they will support, the conversion from both PF and SW to 3rdrb will be really easy now having the 2 player books)