Actually, I the dtd2schema is activated, though I have forgotten to remove the strikethrough on that line in the upload page. There will be occasional instances where a finding aid cannot be uploaded to eXist because it doesn't validate to the EAD 2002 schema. It's difficult to track down exactly what the problem might be in the XML document, even if it validates to the DTD. Few of the University of Virginia Library EAD documents that I tested transform successfully into valid documents, though many finding aids produced by other Virginia Heritage Project institutions uploaded into EADitor after successful reprocessing to be schema-compliant. EADitor is completely schema-compliant now. New finding aids created from scratch validate to the schema. I'd try to open your files in an XML editor that tests for validation (like oxygen) in order to try to fix whatever errors exist before attempting to upload into EADitor.
I'm not sure what the Chrome issue is. I'll try to test it out this week.
Ethan