Definitely an issue within WD… The files get created after midnight and are called MonthYYYY.html (April’s should be called April2011.htm).
1st> I recommend upgrading from 10.37Pb44 to the most current version.
2nd> Check to see if you have local files being created in /wdisplay/webfiles including the monthly and daily.gif’s (I show 35 files created around 8 minutes after midnight). If they are there and not on your WEB Site you can FTP them manually.
3rd> Look at your file creation and FTP timeframe and make sure it set after 10 minutes plus midnight (20 is what I’ve read in other posts is the best).
4th> As long as all the data for this month is under “View > Average/Extremes > Average Extremes tab” you can recreate it for currernt month with “Action> Update Average/Extremes on Internet Now”. I’m not sure about recreating previous month files; however I know there must be a way as I’ve done it in the past. If the data is missing for those days you will need to import them from log files