Digital BW, The Print

I developed two rolls of FP4+ last night in HD-11 and do not recall 
doing anything I had not done 50 or 100 times before.  However, when 
I scanned the negatives they were "filthy."  A very large number of 
small white spots all over the frame.  Looking at the negs with a 
loupe I can see black spots all over.  I am not sure that they are 
dust as they are black.  I used brand new fixer, and I think the stop 
bath and clearer are ok.  Any ideas as to what might be causing 
this??  I air dried the film in the same bathroom I always do and 
neither the hear nor the air came on.  

Most of the negatives on both rolls are beyond spotting with the 
clone tool.  The only thing I can think of is that it was a humid 
night and perhaps the film was not quite dry when I put it in the 
sleeves.  But, not really likely.

While I always assume that there is a fixed ratio of dumb mistakes to 
rolls developed, I would like to know what happened.

Any help appreciated. 

Steve