In order to get custom cursors working in all browsers you need to specify extra non-URL fallback (for FF 3.6). But for IE to be able to interpret that there can't be any extra space after url closing bracket. Selectivizr is adding that space and therefore braking custom cursors.
This happens in line 451 of the development version. There should be extra case for urls that have comma after them (eg. cursor).
Example:
In order to get custom cursors working in all browsers you need to specify extra non-URL fallback (for FF 3.6). But for IE to be able to interpret that there can't be any extra space after url closing bracket. Selectivizr is adding that space and therefore braking custom cursors. This happens in line 451 of the development version. There should be extra case for urls that have comma after them (eg. cursor). Example: