RawDigger Support thumbs up
Last night I sent a message to RawDigger support about an issue with Sigma SD Quattro H files (interpolation missed a row of AF dots) on exported TIFF files.
About 2 hours later they sent an email looking for samples. 8 minutes later an email arrived that they found a sample online that demonstrated the problem and just under 2 hours later they emailed a link for a new version of the software that corrected the problem.
Impressive response time!