If several clips have the dnr plugin active, ripple deleting a clip in the middle will cause vegas to crash every time. Even scrubbing over a dissolve between two clips with dnr will cause a crash. reported to both Sony and plugin´s author

Sony Vegas 6.0
Version 6.0a (Build 99)
Exception 0xC0000005 (access violation) WRITE:0xC IP:0xCCD5270
In Module 'vegdnr.dll' at Address 0xCCD0000 + 0x5270
Thread: VideoRender ID=0x594 Stack=0x7DBF000-0x7DC0000
Registers:
EAX=0000000a CS=001b EIP=0ccd5270 EFLGS=00010296
EBX=00000168 SS=0023 ESP=07dbf0c0 EBP=07dbf1e0
ECX=00000000 DS=0023 ESI=07dbf24c FS=003b
EDX=0cce2444 ES=0023 EDI=0cce22d8 GS=0000
Bytes at CS:EIP:
0CCD5270: 89 41 0C FF B7 A8 00 00 .A......
0CCD5278: 00 8D 45 FC 8D 8D F4 FE ..E.....
Stack Dump:
07DBF0C0: 07DBF24C 07CC0000 + FF24C
07DBF0C4: 00000001
07DBF0C8: 0CCE22E0 0CCE0000 + 22E0
07DBF0CC: 00000001
07DBF0D0: 0CCE22D8 0CCE0000 + 22D8
07DBF0D4: 09F36CB8 09B60000 + 3D6CB8
07DBF0D8: 07DBF30C 07CC0000 + FF30C
07DBF0DC: 7C90EE18 7C900000 + EE18 (ntdll.dll)
07DBF0E0: 7C91B690 7C900000 + 1B690 (ntdll.dll)
07DBF0E4: FFFFFFFF
07DBF0E8: 7C91B686 7C900000 + 1B686 (ntdll.dll)
07DBF0EC: 7C91B298 7C900000 + 1B298 (ntdll.dll)
07DBF0F0: 07DBF100 07CC0000 + FF100
07DBF0F4: 00000000
07DBF0F8: 7C9105C8 7C900000 + 105C8 (ntdll.dll)
07DBF0FC: 09F3B8E8 09B60000 + 3DB8E8
> 07DBF104: 7C910551 7C900000 + 10551 (ntdll.dll)
> 07DBF10C: 7C91056D 7C900000 + 1056D (ntdll.dll)
> 07DBF134: 7C910F46 7C900000 + 10F46 (ntdll.dll)
> 07DBF158: 0CCD6B31 0CCD0000 + 6B31 (vegdnr.dll)
07DBF15C: 07DBF204 07CC0000 + FF204
07DBF160: 00000000
07DBF164: 00000000
07DBF168: 07DBF204 07CC0000 + FF204
> 07DBF194: 0CCD7719 0CCD0000 + 7719 (vegdnr.dll)
07DBF198: 07DBF254 07CC0000 + FF254
> 07DBF19C: 0CCD7727 0CCD0000 + 7727 (vegdnr.dll)
07DBF1A0: 07DBF1B0 07CC0000 + FF1B0
07DBF1A4: 0CCE22E0 0CCE0000 + 22E0
07DBF1A8: 00000000
07DBF1AC: 07DBF320 07CC0000 + FF320
> 07DBF1E4: 0CCD68EB 0CCD0000 + 68EB (vegdnr.dll)
07DBF1E8: 000000F0
> 07DBF1EC: 0CCDA48C 0CCD0000 + A48C (vegdnr.dll)
07DBF1F0: 00000000
07DBF1F4: 0CCE22E0 0CCE0000 + 22E0
07DBF1F8: 00000000
07DBF1FC: 00000000
> 07DBF2AC: 0CCD70CB 0CCD0000 + 70CB (vegdnr.dll)
- - -
07DBFFF0: 00000000
07DBFFF4: 00570850 00400000 + 170850 (vegas60.exe)
07DBFFF8: 04266BB8 040D0000 + 196BB8
07DBFFFC: 00000000