A few Find&Replace problems:
1. If you Replace and Find without a prior Find, it will just insert the replace text at the carret. This could be a feature, but I think it would be better if it just did a Find in that case instead.
2. When a window is outof focus, selection highlighting is dimmed. This makes it _very_ hard to see where Find has found a particular word since the Find window is the active one during F&R.