1 item remaining

I've got frames in my javascript and code:

if (frameDocument.createStyleSheet) {frameDocument.createStyleSheet(url);
}
else {
... <code using appendTo>

The problem is when I run my page in IE7, page loading indicator never finishes and it's written "1 item remaining" in status bar.

After I comment 

frameDocument.createStyleSheet(url);

the message becomes "done" and the indicator finishes, but the css-styles are not applied:)

I tried fiddler but nothing interesting, all the requests are less that 1 second.

How to solve the problem and get rid of that error?