main.mboxFrame.msg in IE, but not in Opera.

[kgun]

I have an very open emailservice where I receive a lot of spam. When I use MS IE, I get an

main.mboxFrame.msg

error that I do not get in Opera.

I only find one hit when I make the following KW search on Google:

KW: main.mboxFrame.msg

explorer error.

I am not sure that it is an Explorer error, since the epost service is codede in Java and JavaScript, that is far from secure in my view. When I scan my Pc with different scanners, sometimes, I only find suspect code in the Java directory. So I do not rely on the Java code in that archieve.

But since I do not get the error in Opera, that indicates that there is an error in IE. But the "error" may also depend on how the two browsers are programmed.

Any suggestions / experience / explanation are welcome, since IE is the browser I use in my day to day work.