@Shun - are you using our latest 3.2.26 update? This looks like an issue brought out by that - we changed the way a couple of formatting tags work in that update and it seems like this database was using those tags in a nonstandard way. (main tags affected were the 'block' tag U+EAC3, which as far as I know we've never documented anywhere, and the 'color' tag U+EAC1, which I'm not aware of any widely-circulated user dictionaries employing) We never embed those tags directly in any of our dictionary databases (they're all generated by another, completely undocumented part of our database system) so we thought it would be a totally invisible change but it seems like there may have been a few user dictionaries using those tags after all.