Since the addition of POLLEVENT to the ufs/vfs functions of current after
Dec 14, netscape 4.04 seems to hang during cache reads from disk.
Reverting to pre POLLEVENT versions of the following functions seems to
fix the problem.
ufs_readwrite.c v1.33 (v1.34)
ufs_vnops.c v1.71 (v1.73)
vfs_subr.c v1.114 (v1.115)
vfs_default.c v1.8 (v1.9)