[Dx4win] strange behavior of Log for unknown reason (Info)

[Giorgio Borgo]

Hello DX4win-users!

Strange behavior for unknown reason. As I entered the newly arrived QSLs
(cfm field to "Y") I did not found 6 of the qsos! First I thought
misswrited call signs, but it wasn't.

Following QSO showed me the "bug": 6W/DL7CM on 80m

He wrote me "not in Log" So I tried to delete this entry (and I know for
sure it was the only one 6W station I ever tried to work on 80m)

I could not find this QSO filtering by:

-Search by call
-Search by date
-Search by band
-Search by Prefix
-looking through the complete log without filter
(search by mode is useless, operating is cw only)

Then I tried:  Reports> DXCC> listing
 6W on 80m was marked as mailed! (As I did in 2006)
double clicking the "M" ended with "QSO not found"!

Now I wrote down the complete log as .csv file, opened a backup from
28.Nov 2008 wrote this down as a .csv file too. Comparing this two files
in a spread sheet made another suprise: No differences so far!

As I reopened the original Log file all missing QSOs showed up and I
could set cfm field to Y and delete the 6W qso on 80m. Reproducing the
bug was not possible, I closed and opened the Logfile several times.

What's annoying me: How many of the QSLs I sent back before, marked "not
in log", were really not in log?

Had anyone this experience too?
I expect the bug is not dangerous, but sure annoying. If you not sure
about one of your QSOs, I suggest close and open the log and try 
again.

Used PCs /Software: 
DX4WIN 7.05.04
Ubuntu 9.04, Linux-Kernel 2.6.28-11
Emulator Wine 1.1.7
on a PIII Coppermine / 512MB RAM
(Backup system is same Software on a AMD Athlon XP 2400+ / 512 MB RAM)

vy 73 es cu in the pile! Giorgio, DJ9CW