An untethered jailbreak for Apple A5 chipset powered iOS devices (namely iPhone 4S and iPad 2) has finally been achieved according to pod2g's most recent blog entry. He updated his blog yesterday stating he had hit a stumbling block but would update us today again. He's kept true to his word and let us know today that he's overcome the cache issue and achieved an untether.
OK, figured it out, the A5 cache is not a problem anymore. I sorted it out by doing the untether in a single thread and by flushing all the dcache then all the icache in a row at a strategical point of the process.
On some websites, like CNN shown in the video above, when I hit "back" to return to the previous page, instead of getting the previous page I get a version of the previous page that's from some time in the past, as much as a day or so. I've also had this happen on sites like Reddit. Unless Apple included highly advanced tachyon-based time travel functionality in iOS 5, there's some problem between the web server, the cache, mobile Safari, and my eyes that's conspiring to give me pages from the past.