I tried R291 and I've activated Dynarec (no improvement but no more crash/bug) and
Dual-Core and when I launched ZWW I got ton of this :
FIFO out of bounds (sz = 1306298, at 00000000)
FIFO out of bounds (sz = 1306330, at 00000000)
FIFO out of bounds (sz = 1306362, at 00000000)
FIFO out of bounds (sz = 1306394, at 00000000)
FIFO out of bounds (sz = 1306426, at 00000000)
FIFO out of bounds (sz = 1306458, at 00000000)
FIFO out of bounds (sz = 1306490, at 00000000)
FIFO out of bounds (sz = 1306522, at 00000000)
FIFO out of bounds (sz = 1306554, at 00000000)
FIFO out of bounds (sz = 1306586, at 00000000)
FIFO out of bounds (sz = 1306618, at 00000000)
FIFO out of bounds (sz = 1306650, at 00000000)
FIFO out of bounds (sz = 1306682, at 00000000)
FIFO out of bounds (sz = 1306714, at 00000000)
FIFO out of bounds (sz = 1306746, at 00000000)
FIFO out of bounds (sz = 1306778, at 00000000)
FIFO out of bounds (sz = 1306810, at 00000000)
FIFO out of bounds (sz = 1306842, at 00000000)
FIFO out of bounds (sz = 1306874, at 00000000)
FIFO out of bounds (sz = 1306906, at 00000000)
FIFO out of bounds (sz = 1306938, at 00000000)
FIFO out of bounds (sz = 1306970, at 00000000)
FIFO out of bounds (sz = 1307002, at 00000000)
FIFO out of bounds (sz = 1307034, at 00000000)
FIFO out of bounds (sz = 1307066, at 00000000)
FIFO out of bounds (sz = 1307098, at 00000000)
FIFO out of bounds (sz = 1307130, at 00000000)
FIFO out of bounds (sz = 1307162, at 00000000)
FIFO out of bounds (sz = 1307194, at 00000000)
FIFO out of bounds (sz = 1307226, at 00000000)
FIFO out of bounds (sz = 1307258, at 00000000)
FIFO out of bounds (sz = 1307290, at 00000000)
FIFO out of bounds (sz = 1307322, at 00000000)
FIFO out of bounds (sz = 1307354, at 00000000)
FIFO out of bounds (sz = 1307386, at 00000000)
FIFO out of bounds (sz = 1307418, at 00000000)
FIFO out of bounds (sz = 1307450, at 00000000)
FIFO out of bounds (sz = 1307482, at 00000000)
FIFO out of bounds (sz = 1307514, at 00000000)
FIFO out of bounds (sz = 1307546, at 00000000)
I don't know if it's usefull for you, I post it just in case.