Different Web Browsers Served Different Cache Copies?

I’ve noted with the latest official release of your plugin that different web browsers appear to be served with different cache files. I haven’t tested this on other computers to see if it’s more than a browser related problem and occurs per-computer.

The issue I have with this is obviously that the system is over-caching the same page multiple times, which mitigates the advantages of caching, when it should only be doing this once and updating according to the timed settings or whether I add new posts etc.

For example it’s 15:52 when I check the front page of my website and I noticed that the page views reported by different browsers is not in sync. After looking at the bottom of the source code I also see that different cache times and related files for the same page are also being called.

Under IE9 the front page cache line reads:

<!-- Dynamic page generated in 0.634 seconds. -->
<!-- Cached page generated by WP-Super-Cache on 2012-11-30 15:44:26 -->

Under Firefox v16 the front page cache line reads:

<!-- Dynamic page generated in 0.639 seconds. -->
<!-- Cached page generated by WP-Super-Cache on 2012-11-30 15:39:24 -->
<!-- super cache -->

Under Chrome the front page cache line reads:

<!-- Dynamic page generated in 0.642 seconds. -->
<!-- Cached page generated by WP-Super-Cache on 2012-11-30 15:44:30 -->

They use to all be loading from the same cached file and time. I consider this to be quite a critical bug or is it something I’ve done?

I’ve conducted various tests and even from a fresh wipe it creates a new file for each web browser, which makes no sense to me.

http://wordpress.org/extend/plugins/wp-super-cache/