There are several reports of new bugs with the Google Search box and the cursor focus issues at Google Web Search Help.

The issue is, that when you start typing a word and then move the cursor to the beginning or middle of the word to refine your query, then the cursor will jump to the end as you are typing. In short, Google is moving your letters from where you want them to go to another position.

I have not been able to replicate it but here are a couple explanations from frustrated searchers:

This user shared a pretty bad screen shot over over here but what I’d love to see is this happening in real time, a screen cast.

This may or may not be related to the Google cursor box not focusing issue from earlier this week.

Forum discussion at Google Web Search Help.