Paint.NET 3.07

* New: Line/Curve tool has been enhanced to allow drawing arrowheads, and to draw with various dashed- and dotted- styles.
* New: Image tab thumbnails now have an indicator if the respective image has unsaved changes (an orange asterisk is shown).
* Improved: The Save Configuration dialog (choose JPEG quality, etc.) now allows you to maximize it. It also remembers its relative location and size.
* Changed: The help file / documentation is now hosted online. This has reduced the download size by more than 3 MB, and will also allow us to provide translations without ballooning the size of the download (each language would have added between 2 and 4MB).
* Changed: The "image list button" (downward triangle) is also shown when only 1 image is open (it used to only display if 2 or more images were open). This is being done for the sake of consistency.
* Fixed: Some operations would reset the selected layer to the first/lowest layer. This selection is now preserved.
* Fixed: The Image->Rotate commands no longer hangs if a selection was active.
* Fixed: Several problems have been fixed with our implementation surrounding the new Vista Open/Save dialogs. This includes: opening an image from an http:// source, opening images from a digital camera that is not mapped to a file system path (such as a drive letter), the Save dialog not always prompting you about overwriting an existing file, and many corner cases that previously caused crashes.