Version 2.6.3 won't save when there are open Reports

[Roger]

I am using version 2.6.3 with Xubuntu 14.04 and changed data is saved 
when there are no open reports.

If I have an open report it appears the .LNK & .LCK files are not closed 
and the changed data are not saved nor are the Reports open after 
gnucash 2.6.3 is restarted.

Even if I manually delete the .LNK & .LCK files before closing data is 
not saved on File/Quit and new .LNK & .LCK have been created if there 
are open reports.

I get the same result with either xml or sqlite3 databases.

If I forget to close the Open Reports I can end up loosing data.

It seems that open reports interfere with the .LCK file procedures.

Any help on how to resolve this problem would be much appreciated.