dumps way too big

[[EMAIL PROTECTED]]

Hello,

One backup partly failed with :

FAILURE AND STRANGE DUMP SUMMARY:
  k400  /mnt/d_mails  lev 1  FAILED [dumps way too big, 1025270 KB, must
skip incremental dumps]
  k400  /home/jpp     lev 1  FAILED [dumps way too big, 1116100 KB, must
skip incremental dumps]
  k400  /etc          lev 0  STRANGE 

for some other directories and machines the backup is OK.
What is the problem ?

Regards

Storm66