First of all - thanks, Mary, for porting Custom Corners to Moodle 2.x.x.
This is my first post to Moodle forums, so please forgive any clumsiness in that respect.
As a newcomer to Moodle, I have only used v2.4 and have set myself two tasks to start with - write a block (incorporating JS) and customize the Custom Corners theme.
While working on the theme, two points came up. Please take a look at my suggested fixes to see if they merit inclusion in the published code.
1) With full-strength debugging the layout breaks spectacularly in IE8 because of an error message above the DOCTYPE declaration.
2) The top corners of the side blocks (they gave you grief in January 2012) now look as though there is some kind of overlap.
Fix #1 just needs a change to line 38 of *renderers.php*.
*function block($bc, $region) {* becomes
*function block(block_contents $bc, $region) {*
Fix #2 overrides the *margin-top:-4px* added on 13-Jan-2012. It is on line 358 of *layout_styles.css* and affects *div.block div.i3*. This can easily be overridden to set the top margin to zero.
Thanks again for all your work on this theme.
Philip