What did you do and what did you do it with ?
Your going to have to be a lot more specific than that.
What is the source footage format ?
What are your project property settings ?
What are your render settings ?
Is the source footage 720-25p or interlaced ?
Folder: D:\Users\mig\Documents\My Video\Recordings
Type: Video for Windows
Size: 5,66 MB (5.796.664 bytes)
Created: 4. november 2012, 17:30:47
Modified: 4. november 2012, 17:31:31
Accessed: 4. november 2012, 23:11:01
Video: 00:00:43,933, 30,000 fps, 1280x720x32, DivX 6.9.2 Codec (4 Logical CPUs)
Audio: 00:00:00,000, 128 kBit/s, 44,100 Hz, Stereo, MPEG Layer-3
ACID chunk: no
Stretch chunk: no
Stretch list: no
Stretch info2: no
Beat markers: no
Detected beats: no
Command markers: no
Media tags: no
Folder: C:\Program Files (x86)\Sony\Vegas Movie Studio HD Platinum 11.0\FileIO Plug-Ins\aviplug
Format: Video for Windows
Version: Version 11.0 (Build 322)
Company: Sony Creative Software Inc.
Ok that tells us something. The source file is 30 fps so choose HDV 720-30p in your project properties and render settings. This may not totally solve the issue but should help.