Today on the way to work my bike computer switched over to a less than useful display of 8 rectangles, and none of the buttons would fix it. Having no idea of what to do I rang Michael at Fuse Recumbents who suggested pulling the battery and re-entering the parameters (such as the 1302mm wheel size).  

Combined with the information I had backed up on Bike Journal this appears to have worked and I haven't lost too much data and can probably recalculate what was lost anyway. Thanks Mike!