With the latest update to geocaching.com, I found that I had to scroll the log entry page down to get to the Submit button. And at the screen resolution I use, there was a lot of wasted space to the right of the text entry box. This script takes care of that, by removing unnecessary white space, giving you control over the size of the input box, and hiding the inventory drop-down selector until needed (the number of items in inventory is shown instead).
The script adds 4 size control icons (the green arrows) to the right of the "smilie" button. These let you have full control over the size of the text entry box. By clicking an arrow, you move either the bottom or right side border of the box in the direction of the arrow.
To the right of the arrows is the Validator switch. When turned on (green checkmark), the script keeps the Submit button deactivated until you have selected a log type, and enter some text into the text box. This keeps you from submitting a log that's going to be returned with an error message.
To the right of the Validator switch is the Quote icon. Clicking this icon will cause the text in the text box to be given email-style quoting. Appropriate link breaks are made, and each line is prepended with a ">" character. If you highlight a portion of text, only the highlighted text will be quoted. The remaining text will be unaffected. If no text is highlighted, all text in text box will be quoted.
Lastly is the Characters Remaining switch. When turned on, it will show a running total of the maximum characters remaining (out of 4,000). If this option is turned off, it will automatically turn on when the remaining character count drops below 100.
Change Log:
v2.2 (2008-10-14) - Added menu option to select font for text area. Choose the font from the font list, and select "Use currently selected font for text area" from the Greasemonkey menu. Added "Smiley Bar", which replaces the system's pop-up window. Just click the smiley icon to automatically insert it into your log.
v2.1 (2008-07-27) - Added coordinate paste-box.
v2.0 (2008-07-24) - Added edit controls for Bold, Italics, Strikethrough, Fonts, Text Color, and Hyperlinks. Added Date Detection, to notify when selected date is not the current date. Added ability to rename the months to that of other languages. Added control to change selected date to current date. Added menu option to control if inventory is initially hidden or shown. Fix to accommodate website changes.
v1.5 (2007-10-09) - Minor fix to accommodate website changes.
v1.4 (2006-08-23) - Minor fix to accommodate website changes.
v1.3 (2006-07-17) - Cosmetic update. Replaced text-based controls with icon images from the famfamfam.com "Silk" icon collection. Pretty!
v1.2 (2006-05-11) - Text quoting added. Copy text to text box and click the Quote icon. Line breaks will be added at the approximate line width, and each line prepended with a ">".
v1.1 (2006-03-17) - Remaining Characters display added.
v1.1 (2006-03-17) - Travel Bug inventory is now hidden, and inventory count added next to submit button (if inventory not empty). Click on inventory count to show/hide the inventory selector box.
Greasemonkey 0.6.4 (Firefox 1.5) Compatible!
Install script: 
To install, right-click on the icon, and select "Install User Script". If you do not see the menu option, click on the icon to open the file in a new tab (or window), and select "Install This User Script" from the Tools menu.
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