Several possibilities:
1. The vertical scroll bar appeared when enough of the paged loaded to make it longer than the screen, and it knocked objects around or shortened line lengths (causing text to wrap).
2. An image finished loading, and it is larger or smaller than the initial space the browser left on the screen for it.
3. You have code with the text fill-in cursor jumping to a place which is not on the screen. The screen scrolls so the cursor appears.
4. There is an ad on the page, and it is "selfish", scrolling the page to be visible.
5. A flash, script, or other slideshow has images of different sizes.
MidiMagic
Nearly a Senior Poster
3,319 posts since Jan 2007
Reputation Points: 730
Solved Threads: 182