[OSM-newbies] How to search for a mis-spelt tag?

[m902]

By mistake I used "Landuse" instead of "landuse" as a tag for quite a 
few entries.
I want to check that I corrected them all.
Is there some way of searching for these mis-spelt tags?
Couldn't see anything in Potlatch.
In JOSM, searching for "Landuse" gives me results for "landuse" so that 
didn't help.
Thanks
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