Changed Entry Dates after updating from 2.6.4-2 to 2.6.6 and/or 2.6.7

[Detlef Kattenstroth]

I am using Gnucash version 2.6.4-2 on Windows 8.1

 

Everything works fine and proper here, but then I updated to
2.6.6 and

all of a sudden all the dates of my entries changed with the
most recent

ones set to NOVEMBER 2060, so I reverted back to 2.6.4-2 and
all was back well.

 

After 2.6.7 came out I updated to it and got exactly the
very same result. All my

entry dates were changed with the most recent set to
NOVEMBER 2060. So I

reverted back to 2.6.4-2

 

What could be the problem of this?

Thanks for any help in advance