The firmware update Ver.1.01 from Ver. 1.00 incorporates the following issue
1.Adding the compatibility with “XF18-55mmF2.8-4 R”.*You will get the full performance with the new zoom lens “XF18-55mmF2.8-4 R”.
2.The phenomena below will be fixed.(1)The auto focus accuracy with XF60mm Lens could not be enough.(2)When using the M- Mount Adapter, under exposure could occur.
For operation of M mount adapter effectively, please check and download PDF file at the following URL
1.To enable those features, please confirm the firmware version of your Fujinon XF lenses (XF18mmF2 R / XF35mmF1.4 R / XF60mmF2.4 R Macro) is Ver 2.01.
2.The firmware version of XF18-55mmF2.8-4 R LM OIS is shown as Ver 1.00, and no firmware update is required.（as of Nov/2012）
See on fujifilm.com