Hello timethief - I have cleared my cache and cookies now. Still not working.
"I have just viewed your blog using both Firefox 3.6.13 and IE8. I do not see anything at all that's odd about the display."
The background issue I'm seeing seems to affect only the homepage (previously white, now seen as a pale blue in both background AND posts/sidebar/footer. I set the pale blue as background because the Duster default background is a darker grey). This is likely why, when the background first went wonky, all text on the homepage (both posts plus sidebar/footer areas) were illegible because my former background was a colourful print. Got rid of that background pronto, even though I'd love to reset that if/when we get this mystery solved.
The default color for all posts/pages seems to be white. This is good. But now the homepage has NO WHITE - just the pale blue background over everything.
I have just tried, after clearing cache/cookies, to re-install the calendar widget in the sidebar. Oddly enough, this returned the previous white homepage sections, but the calendar was once again now on the footer, spread wide and weird across the entire page bottom. So I deleted the calendar (again).
Is there any way we can return the white central section to the homepage? I'm so frustrated that I'm ready to just forget about adding the calendar and links, although it would be a pain not to be able to insert anything more to the sidebar. Do I just have to live with the pale blue over the entire homepage from now on?