that is what i like
I also waiting for update of my 2760 (should be 3.7.8 as well) to test, should be soon out

Here you are babis3g. Just a few quick tests on the VECTOR2 firmware.

Draytek 2860n 3.7.8 VECTOR2 - VDSL Firmware AnnexA_571a17_570111
================================================================

DS Actual: 39993000 bps US Actual: 9809000 bps
DS Attain: 59931008 bps DS Attain: 10125312 bps
DS Actual PSD: 6.5dB US Actual PSD: 12.1dB

NE CRC: 12 FE CRC: 21
NE ES: 12 FE ES: 20

SNR Down: 13 dB SNR Up: 6 dB

Draytek 2860n 3.7.8 VECTOR2 - VDSL Firmware AnnexA_572d07_570e01
================================================================

DS Actual: 39993000 bps US Actual: 9995000 bps
DS Attain: 59405120 bps DS Attain: 10695930 bps
DS Actual PSD: 6.8dB US Actual PSD: 12.1dB

NE CRC: 4 FE CRC: 21
NE ES: 4 FE ES: 20

SNR Down: 12 dB SNR Up: 6 dB

I did find this in the release notes

For DSL models, there will be two folders: STD and VECTOR.
The files in VECTOR folder implement a new DSL driver, which supports G.Vectoring on VDSL.
If you're using a VDSL line, VECTOR firmware may brings out better performance; however, please consult your ISP to check if G.Vectoring is required.
We also provide two versions of Vector firmware to avoid the interoperability issue.
You could just try the other one if the one you use cannot synchronize or get the speed that you expected.

Thanks
hope will keep the line stable and DLM will not kick by time ...
don't play too much with them in sort time, just give them time for changing firmwares, the DLM may see it as fault with too many disconnections
My 2760 had vector firmware (only 1 version) since last august/september and is stable well for my adsl line & i am using it already with good results (well right now i have a 2830n on but later will go back to it)

Some more for you babis3g. This is using the STD firmware, not the VECTOR on the same device/line. Looks to me like STD is better for my line. No errors, better PSD.

Draytek 2860n 3.7.8 STD - VDSL Firmware AnnexA_548006_544401
============================================================

DS Actual: 40000000 bps US Actual: 9996000 bps
DS Attain: 59180016 bps DS Attain: 11175612 bps
DS Actual PSD: 6.8dB US Actual PSD: 9.9dB

NE CRC: 0 FE CRC: 0
NE ES: 0 FE ES: 0

SNR Down: 11 dB SNR Up: 6 dB

Draytek 2860n 3.7.8 STD - VDSL Firmware AnnexA_560816_552011
============================================================

Will not connect to DSLAM

****I should add my DSLAM is IFTN ****

Thanks for your effort
It may helps other users as well
Down here in Greece i am right now, some users with Infineon dslam/cabins (vdsl) mentioned the STD is better for them

Then to me seems vector is slightly better only with broadcom exchanges (i am)
I also have seen users getting 1-3 more mbps with vector & broadcom

It turns to be the modem code ... (i was believing has something to do with the noise cancelation the vector was offering but seems i was wrong)
The 2860/2760 are Lantiq (ex infineon) so you should not have really issues with any firmware, but yes some modem codes may be better
http://www.draytek.com/index.php?option=com_k2&view=item&id=1226&Itemid=293&lang=en

Yes, Draytek STD firmware does indeed seem to be the best with IFTN.

Just to note, I am sticking with the STD firmware, as the jagged edges (ping spikes) on my Broadband Monitor have now also disappeared. Vector firmware introduces the almost sawtooth effect.

I now have a nice smooth line.