Just went to download and it looks like it has been upgraded already.

lackBerry Handheld Software v4.5.0.81 (EastAsia)

Package Version: 4.5.0.81
Consisting of:

* Applications: 4.5.0.55
* Software Platform: 2.7.0.68
* File name: 8100EastAsia_PBr4.5.0_rel81_PL2.7.0.68_A4.5.0.55_H utchison.exe
* File size: 73.9MB

Why such a quick change?