CSS background images load slowly via SSL and never seem to be cached

Dear all,

When accessed via http my CSS background images
all seem to be loaded by the browser and then
cached for future use. So, the first time a page
loads it may be a litttle slow but after that
it's fine.
However, when accessed via https the images never
seem to be cached and are always slow to load.
The CSS defines the background images with
relative paths and does appear to use the current
scheme correctly.
Images included via the <img> tag don't seem to
be affected in the same way: they cache in both
scenarios.
Does anyone know if this is a limitation of
CSS/browsers in general/only some browsers/SSL or
maybe a configuration problem somewhere?

Thanks in advance!

CSS background images load slowly via SSL and never seem to be cached

--------------------------------------------------------------------------------

Dear all,

When accessed via http my CSS background images
all seem to be loaded by the browser and then
cached for future use. So, the first time a page
loads it may be a litttle slow but after that
it's fine.
However, when accessed via https the images never
seem to be cached and are always slow to load.
The CSS defines the background images with
relative paths and does appear to use the current
scheme correctly.
Images included via the <img> tag don't seem to
be affected in the same way: they cache in both
scenarios.
Does anyone know if this is a limitation of
CSS/browsers in general/only some browsers/SSL or
maybe a configuration problem somewhere?

Thanks in advance!