Forwarding some news from the Logitech support forums, in my own words:
- Logitech Profiler (the main drivers/software) was getting a major rewrite (6.0 - Don't remember) that has been worked on for a long time, since September we assume, 7 months. So long that the bugs of the G940 was really infuriating users, who were kept in the dark about any updates/bug fixes. Enough angry customers and probably to patch the damaged reputation of the G940 has made them divert resources for a minor (but major in importance) update, version 5.09.
- 5.09 is not far from release. Has seen limited distribution to software developers for last minute feedback.
- Focus of release is bug fixes, but not entirely.
- Profiler bug fixes are mentioned.
- Unspecified functionality bugs to be fixed (probably the reversal bug which is pretty major, and was confirmed as being worked on to fix in December 2009).
- Changes/work-arounds of force feedback implementation in third party games (that would be all games that has force feedback support I suppose?). Centering spring force is mentioned specifically. I believe it most likely to be the 'slop' issue in sims such as IL-2.
- One type of BSOD eliminated.
- New capabilities of the device will be unlocked.
- More specifics coming within a week.