AFAIK, the edit time in an office document is the amount of time spent editing the document, not an absolute date. org.apache.poi.hpsf.SummaryInformation.getEditTime() should probably return a long that indicates the number of milliseconds was spent editing.
I see. Is this documented somewhere?
It is actually more by reasoning. Whenever I look at an office document with the POIBrowser, I see edit times in the 1600's. Since I know microsoft's epoch is around that time, I figured that the field was simply mis-interpreted. I'll attach a sample word doc that msword reports (File | Properties) as having an edit time of 6 minutes and POIBrowser reports it as having an edit time of "Sun Dec 31 16:03:00 PST 1600".
Created attachment 8091 [details] Document with edit time of 6 minutes
Fixed in the CVS repository's HEAD.