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You'll get errors like this in the log file (info menu/show log)
[2014-05-27 12:22:21] DEBUG: Input stream #0:0 frame changed from size:4096x2318 fmt:yuvj444p to size:4096x2319 fmt:yuvj444p
[2014-05-27 12:22:22] DEBUG: Input stream #0:0 frame changed from size:4096x2319 fmt:yuvj444p to size:4096x2318 fmt:yuvj444p
[2014-05-27 12:22:23] DEBUG: Input stream #0:0 frame changed from size:4096x2318 fmt:yuvj444p to size:4096x2319 fmt:yuvj444p
[2014-05-27 12:22:24] DEBUG: Input stream #0:0 frame changed from size:4096x2319 fmt:yuvj444p to size:4096x2318 fmt:yuvj444p
[2014-05-27 12:22:24] DEBUG: Input stream #0:0 frame changed from size:4096x2318 fmt:yuvj444p to size:4096x2319 fmt:yuvj444p
[2014-05-27 12:22:24] DEBUG: Input stream #0:0 frame changed from size:4096x2319 fmt:yuvj444p to size:4096x2318 fmt:yuvj444p
To fix it:
In LRT check, if the crop columns are visible after loading that sequence, and if so, right click on the table header for one of those and "initialize". This will clear the crop. Then save, read Metadata in Lightroom and export again from Lightroom. This should help.