In the UK, US and other countries, commas (and not dots) are used as thousands separators, e.g. 10,000 = 10 thousand (not 10.000).
The problem with this is that whenever a comma is used as a thousands separator in Firefox Bookmark tags, the comma is interpreted incorrectly, so that in the case of 10,000 the 10 and 000 get separated.
I'm not sure what the best solution would be. Maybe use semicolons instead of commas? Use a different separator?
But something needs to be done to fix this glaring problem.