There was a thread with these question earlier but it seems most people talked about the other questions. I'm pretty curious about these so I decided to make a new thread. References would be helpful.
Do the extend potion and eternal potion discoveries work on extracts? MaverickWolf said no, but I have trouble understanding why that would be the case. To me Extend is like a metamagic, so why wouldn't it work for the Alchemist's "spells"? I realize that potions are a big part of the Alchemist, especially now that they get brew potion for free, but even brewing potions is costly, Especially compared to wands and other spell casters.
Does the extended splash radius of explosive bomb work with other bomb types? I know in specifically states that bomb discovery do not stack unless specifically stated, but the wording is a little funny and I could see the argument either way. it doesn't bother me if it doesn't transfer, but it would be awesome if it did.
It has been stated that by Jason that eternal and extend potion only work on potions, this caused a lot of confusion before Alchemist could make potions (IIRC). It's believed to be done for balance reasons since potions can only go up to level 3.
As far as bombs are concerned you can only have one type of bomb at a time for instance acid bomb can't be used with sonic bomb. It is worded that explosive bomb is a type of bomb so following that logic you can't have an acid bomb that has a splash of 10 and catches the target on fire. However it seems that precise bomb is a modifier for your bombs so all your bombs could use precise bomb. The wording on those two are very similar so I could be mistaken and I hope this things are spelled out before it gets printed.