The origin was unknown to me, I am sorry I did not specify this clearly. Additionally, the tests I have done with $(de)compress have failed when handling (de/compressing) large amounts of data. This may have been fixed in recent versions, but I have no indication of this. Feel free to conduct such tests and post the results.
I would also like to point out that I did not state that Zlibs "methods" are flawed, but rather that mIRC's $(de)compress identifiers are or were flawed. I would like to make this absolutely clear.
