I replaced a fuse in the break-out box for the dust monitor at location 7 in the LVEA. From a plot of H0:PEM-LVEA_DST7_MODE, it looks like it went out around January 28, 2012 at 17:15 UTC.

Attached are plots of dust counts > .5 microns. Seems like high counts in the LVEA, including in the clean room around BSC8 (H0:PEM-LVEA_DST15_5).