drupal_mkdir does not set permissions to directories it created recursively
image_dimensions_scale() and image_scale_effect() are ungrokable and buggy
Populate HTML image tags with dimension attributes (like D6 imagefield) without re-introducing I/O
Fix support for remote streamwrappers
Default image is not set to permanent and saved to the wrong schema
Remove cruft from theme_image_style() and image_style_url()
Remove unnecessary I/O from theme_image()
drupal_write_record() unnecessarily sets primary keys while updating
Don't insert default values into db in drupal_write_record()
Handle uncaught exceptions (blog post)
Text column type doesn't reliably hold serialized variables
Use CSS3 / IE filter to render toolbar shadow