Is Firefox 1.0 Less Stable than Firefox PR1.0?

An anonymous reader wonders: "I had Firefox 1.0PR running smoothly on three different machines and it hardly ever crashed. After upgrading to 1.0, I seem to have at least one annoying crash a day. On one of the machines, using the 'self update' feature caused Firefox to crash in middle of the upgrade and left it in a completely unusable state. Eventually, I had to uninstall it and resort to using IE to download the full installer, again. Is it just me, or are other heavy Firefox users noticing this sort of behavior?"