Cursor position is not set correctly when switching to source view

[nicholasbs]

The cursor placement works correctly in Safari when first switching into source view mode, but does not on subsequent changes into source view mode.

To reproduce:

1. Insert the text, "This is a test"
2. Position the cursor someplace in the text (e.g., after the word "This")
3. Switch into source view. Note that even though the cursor doesn't show up, it is in fact placed correctly (you can verify this by typing a character or two)
4. Switch back to HTML mode. Note that the cursor is visible and stilled positioned correctly.
5. Switch to source view again. The cursor will again disappear, and this time you can't type anything.

Tested on Safari 3.1.2. FF3 does not have this problem.