Is it really safe to run avisynth with other application?

[Valeron]

in the past few days, i usually met "bad" frame when encode with avisynth. no matter how i write the script and what filter used.
it's so weird the "bad" frame generally will only appear once in every encode.
here is a sample

i've ever runned memtest86+ and prime to check stability of my machine. 10 pass without error in memtest86+(i haven't tried to run it overnight), Prime for Windows can run for hours.

My hardware configuration:
CPU: AXP Barton 2GHz(200x10), slightly OC from 2500+.
RAM: Kingmax DDR PC3200 CAS by SPD 256M x2.
Mainboard: soltek 75FRN2-L(nforce 2 ultra400)
HDD: WD800BB + Hitachi T7K500 320G
OS: XP SP2 with latest patches

i'm confused about the bad frame produced. if avisynth is not safe enough to run together with other program? memleak? or probably another hardware failure such as IDE cable corrupt?

addon: memtest86+ will reserve 2M ram for bios and dos, will errors hide there?

[Boulder]

What Avisynth build are you using?

Try without any overclocking or even underclock.

[Valeron]

2.57 final official stable build from sourceforge.
thx for ur suggestion. i'll try encode under default clock later.

but it's so weird while running Prime(several hours) and memtest86+(10 pass) report no errors at all.

[techreactor]

2.5.7 causes some problems with DVD-RB tool and JDobbs recommends to use 2.5.6a ver. i.e if you are encoding using DVD-RB

[Valeron]

XviD, x264 and RealVideo all output such kind of bad frame, so i think it's not an encoder compatibility bug.