Ting, with all due respect, the 2-pass crash has been around since version 4.x and is well documented in many forum posts. I strongly believe it's the assertion failed crash at the end of encoding the 2nd pass. I have not been able to successfully use 2-pass encoding (to ps3 or psp profile) since about version 3.2.x. I actually am still using a 3.2.x to do all my encoding because it has not worked since about then. Every version of 4.x gave me the assertion failed error. And now, in version 5.x, it's still crashing in the same place, but it's being covered up by an "oopsy, DVDFab has encountered an error, please fill out the information and submit the crash information to DVDFab" dialog box. I have "sent" this information several times, and I've even contacted tech support. I have tried all versions (including betas) of 4.x and 5.x on brand-spanking-new Windows XP and Windows Vista machines, so I know the installs are "clean" and there is nothing "left over" from a previous DVDFab install. This is very frustrating because my destination is a PS3, so it's the only profile I desire to use DVDFab for.... and if it can't work, then I'm stuck using version 3.2.x... which still has many audio/video sync issues with more current DVD's. If you need anymore information from me to help debug the problem, let me know... I can reproduce this issue on any of my multiple computer OS configurations. Thanks.