Mozilla Bugginess
While updating earlier today, I noticed that refreshing my page within Mozilla would produce the error message: "The file / cannot be found. Please check the location and try again." I did as instructed, and it didn't work. I thought it might be a problem on the server side, but nothing had changed (that I could see). I didn't think about it too much, as it worked in Internet Explorer.
Then mom mentioned that the same thing happened to her today, and it happened to me again a few minutes ago. I did some looking into it, and it appears to be an old Mozilla bug that has cropped up again in recent builds, including the latest stable release (1.2.1). It's not yet fixed, though it is blocking the release of 1.3b (so we can be fairly certain that it'll be fixed soon).
If this happens, there is a workaround: simply clear the cache. Select Edit | Preferences..., click "Advanced" in the left-hand column, click "Cache," and click the "Clear Memory Cache" and "Clear Disk Cache" buttons. Should fix the problem.
