Poping sound only on some movies

[spooky]

OK this one is a little confusing to me, why would some movies come out perfectly & some will have a little poping in sound, especially when the audio gets lauder, for example during some high action battles.
I am using DVDx to convert from a ripped DVD to Divx, I have followed the DVDx step by step, I did for example ( testing it ) Harry Potter movie & it came out perfect, but then I did Star Trek: First Contact & that one has a little pop in the audio. I have kept the settings the same ( except for the bit rate )
Now, I did this Star Trek with Flask before & I had that poping too, but when I watch this movie on my DVD Player it works fine.
Any ideas?
Am using Divx 5.02, Lame MP3 codec for audio.
Used Smart Ripp for the DVD rip
Thanx

[KilrB]

I am having the same troubles

Any one have any suggestions?

[Epi]

You might try using another audio track, for example I tried ripping Titanic and got the popping sounds with the Dolby Surround soundtrack, but when I used 5.1 Surround track I didn't the popping sounds.

Hope this helps

- Epi