Density map containing all K_s band stars for tile 6_6 using aperture photometry (top), PSF photometry (bottom) from the VMC v20120126 release. The low density gaps are described in Table 1 and are much smaller in the PSF photometry. The 10 × 7 pattern of small gaps in the aperture photometry does not reflect a lack of data, but rather where the confidence is high due to contribution from multiple detectors. A software bug introduced as the VSA rescaled the confidence levels and pushed the values beyond the overflow limit so they show as low confidence rather than high, and hence not plotted. This bug has been fixed in future releases.