Interesting. Played in VLC I get the inital 1/2 sec of rain then clean. In PP CS6 I get no rain in import or on export, so it is clean. However our files are differnet. Your bit rate is double mine which shouldn't mater however when I do a mediainfo on our 2 files mine has a GOP structure and yours does not. So we have some sort of difference in our 2 MTS files apart from the bit rate.
Jims file that looks ok:
Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Codec ID : 27
Duration : 10s 552ms
Bit rate mode : Variable
Bit rate : 44.7 Mbps
Maximum bit rate : 92.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.898
Stream size : 56.2 MiB (95%)
Andys file that faults:
ideo
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Format settings, GOP : M=1, N=12
Codec ID : 27
Duration : 30s 720ms
Bit rate mode : Variable
Bit rate : 25.1 Mbps
Maximum bit rate : 30.6 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.544
Stream size : 91.8 MiB (95%)