The fringe correction for y band is sometimes incorrect. I generated some histograms to see which chips are affected and how bad it is. I selected fringe_0 out of the database for y band images taken between 2010-12-01 and 2011-01-06. The following histogram is generated, with a log scale for the y axis and the x range restricted between 0 and 25. Sometimes fringe_0 was greater than 25, but including these in the histogram is not necessary to find out which chips are having problems with the fringe correction. Also, sometimes fringe_0 is set to NULL, and this occurs throughout the exposure, and these are ignored in the histogram as well. Finally, fringe_0 is always greater than 0 (for the dates I selected).

An example of an exposure where things explode:

select exp_name, class_id, fringe_0, fringe_1, fringe_2 from rawExp join chipRun using(exp_id) join chipProcessedImfile using (chip_id) where filter = 'y.00000' and exp_name ="o5562g0127o" ; 
+-------------+----------+----------+----------+----------+
| exp_name    | class_id | fringe_0 | fringe_1 | fringe_2 |
+-------------+----------+----------+----------+----------+
| o5562g0127o | XY01     |  2.89989 |  1.73069 |        0 | 
| o5562g0127o | XY02     |    14.56 |  3.56425 |        0 | 
| o5562g0127o | XY03     |  2.84405 | 0.372487 |        0 | 
| o5562g0127o | XY04     |  2.19512 | 0.206826 |        0 | 
| o5562g0127o | XY05     |  3.92425 | 0.603826 |        0 | 
| o5562g0127o | XY06     |  7.02395 |  4.09365 |        0 | 
| o5562g0127o | XY10     | 0.968364 | 0.676746 |        0 | 
| o5562g0127o | XY11     |  6.19634 |   1.9363 |        0 | 
| o5562g0127o | XY12     |  3.39375 | 0.281118 |        0 | 
| o5562g0127o | XY13     |  2.23806 |  0.28201 |        0 | 
| o5562g0127o | XY14     |  3.21626 | 0.466184 |        0 | 
| o5562g0127o | XY15     |  3.22006 | 0.427613 |        0 | 
| o5562g0127o | XY16     |   7.3712 | 0.533297 |        0 | 
| o5562g0127o | XY17     |  4.95411 |  1.24659 |        0 | 
| o5562g0127o | XY20     |  1.49795 |  0.27659 |        0 | 
| o5562g0127o | XY21     |  1.96783 | 0.363736 |        0 | 
| o5562g0127o | XY22     |    2.053 | 0.310085 |        0 | 
| o5562g0127o | XY23     |  50.7438 |  29.1275 |        0 | 
| o5562g0127o | XY24     |  1.60155 | 0.061001 |        0 | 
| o5562g0127o | XY25     |  2.48234 | 0.024439 |        0 | 
| o5562g0127o | XY26     |  4.41207 | 0.174691 |        0 | 
| o5562g0127o | XY27     |  2.19813 | 0.556806 |        0 | 
| o5562g0127o | XY30     |  2.37545 |  0.23392 |        0 | 
| o5562g0127o | XY31     |  3.12675 | 0.045992 |        0 | 
| o5562g0127o | XY32     |  2.11341 | 0.353222 |        0 | 
| o5562g0127o | XY33     |  1.96237 | 0.181551 |        0 | 
| o5562g0127o | XY34     |  3.43797 |  2.31409 |        0 | 
| o5562g0127o | XY35     |  1.14019 | 0.260336 |        0 | 
| o5562g0127o | XY36     |   3.5544 | 0.210973 |        0 | 
| o5562g0127o | XY37     |  1.43281 | 0.059052 |        0 | 
| o5562g0127o | XY40     |   8.1172 |  3.78008 |        0 | 
| o5562g0127o | XY41     |  3.78775 | 0.398204 |        0 | 
| o5562g0127o | XY42     |   3.1402 | 0.666876 |        0 | 
| o5562g0127o | XY43     |  2.67856 | 0.111939 |        0 | 
| o5562g0127o | XY44     |  2.21637 | 0.309348 |        0 | 
| o5562g0127o | XY45     |  1.66679 | 0.079452 |        0 | 
| o5562g0127o | XY46     |  1.80905 | 0.060166 |        0 | 
| o5562g0127o | XY47     |  6.31662 |  1.83607 |        0 | 
| o5562g0127o | XY50     |  2.89176 | 0.671724 |        0 | 
| o5562g0127o | XY51     |  2.99941 | 0.296205 |        0 | 
| o5562g0127o | XY52     |  1.78046 |  1.99846 |        0 | 
| o5562g0127o | XY53     |   5.4713 | 0.396272 |        0 | 
| o5562g0127o | XY54     |  7.84851 | 0.787676 |        0 | 
| o5562g0127o | XY55     |  2.33387 | 0.056494 |        0 | 
| o5562g0127o | XY56     |  1.03215 | 0.967722 |        0 | 
| o5562g0127o | XY57     |  1.77904 | 0.182634 |        0 | 
| o5562g0127o | XY60     | 0.925654 | 0.700109 |        0 | 
| o5562g0127o | XY61     |  2.52718 | 0.513826 |        0 | 
| o5562g0127o | XY62     |  5.37332 | 0.317587 |        0 | 
| o5562g0127o | XY63     |  2.97252 | 0.216043 |        0 | 
| o5562g0127o | XY64     |  3.26208 |  1.44433 |        0 | 
| o5562g0127o | XY65     |  4.76977 | 0.224413 |        0 | 
| o5562g0127o | XY66     |  1.57893 | 0.074323 |        0 | 
| o5562g0127o | XY67     |  1.55014 |  1.05426 |        0 | 
| o5562g0127o | XY71     |  1.66548 | 0.751917 |        0 | 
| o5562g0127o | XY72     |  2.17629 | 0.713648 |        0 | 
| o5562g0127o | XY73     |  7.34344 |  3.12153 |        0 | 
| o5562g0127o | XY74     |  8.77662 |  7.10027 |        0 | 
| o5562g0127o | XY75     |  3.15082 |  1.04803 |        0 | 
| o5562g0127o | XY76     |  1.44667 | 0.463873 |        0 | 
+-------------+----------+----------+----------+----------+

In this exposure, XY23 exploded, and does not have a good fit for the fringe.