@mangeons – Haha, that didn’t help me much. :D The problem is that I was first taught British English in school, in Sweden, and later on I lived for two years in the US before moving back home to Sweden. Hence, my present use of English is probably a mismatch of grammatical rules from both English languages. Throw in some laziness, confusion and misconceptions to that pot as well. ^^
I’ll look into it though and see if I can’t find the reason. Maybe I’ll post it as a question. :)