problems with copy

I'm getting lots of delimited files from Excel and MySQL users that,
mid-file, begin truncating lines if ending in null values.

for example:
1781: "one","two","three",,,,,,
1782: "one","two","three",,
1783: "one","two","three",,

(delimited files from Open Office are well behaved)

is there any way to handle this apparently standard aberration in PG?


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