If you click the Replace button fast enough, it skips over text that it should be replaced. You don't have to click Replace very fast for this to happen. I find this behavior highly unexpected.
Steps to reproduce problem:
- Start a new document of about 50 lines where each line consists of a single character, "a".
- Set up a Find and Replace where "a" gets replaced with "bbbbbbbbbbb".
- Turn of Wrap Search.
- Click the Replace button rapidly.
- Many of the a's will be skipped.
If you click Replace slowly, the problem doesn't occur.