Sorry if this is the wrong category, but it was this or "Database"!
I keep my collection list in Brickset (because it's easy) but like to use Rebrickable for its "Sets you can build" feature. So I frequently export my current collection list from Brickset as a CSV file, then import it into Rebrickable. That used to work fine (other than the odd set that got dropped due to it being differently numbered - 255 Farming Scene being one example).
However, the CSV export file recently seems to have acquired additional columns, which aren't recognised by Rebrickable. In fact, it's currently telling me I've got 1000 each of 8527, 8094, 8035. If I had that many Mindstorms sets I'd be selling most of them and buying everything else I could get my hands on:-)
I'm not sure whose problem this is - Brickset's for changing the format, Rebrickable's for not doing so, or mine for trying to use both systems...!
Anyone else had the same issue?