Recently I noticed a problem with what appears to be JField shifting the background image. It is not known how long this issue has been present. To illustrate this problem I've created a background map in Global Mapper in the RMaps SQLite .sqlitedb format which included as part of it two surveyed points shown here as 2 small bright green blurry squares labeled in black lettering Stone_32_AVG and Stone_35_AVG. Note that they fall most reasonably on top of the 2 even blurrier gravestones. After importing this into JField, the problem becomes clear, there is a shift between the actual surveyed points (vector) shown with its labels in light blue and the raster background image.
The magnitude of the horizontal shift is about 3.5' in the northing and about 0.4' in the easting.