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May I ask you to also check and make sure that you use the latest Editor build (322.7) - as if you are with an older build - this might have already been solved as a problem.
If you are with the latest build and the issue is still there can you please send us a sample of one such file?
The forum only accepts up to 5MB attachments - so please e-mail it to firstname.lastname@example.org
with a link back to this topic and we will look at it and advise further.
Please also include a screenshot with the OCR settings you are using.