I have to add here that harmonics have affected a wider range of frequencies from 1G/1H received in several parts of Greece!
Prior to 1L for example, no problems with Astra 1G/1H had occurred in Northern Greece, as all frequencies were received flawlessly even with a dish of 80cm!
Astra 1L brought many problems to the Astra 1 reception as its harmonics have not only affected the frequencies of the opposite polarization but also a range of frequencies between 11950-12250 on both polarizations, and this phenomenon peaks especially on 12070H & 12090V which are currently impossible to receive during daytime with dishes smaller than 1m from Central Macedonia and easternmost!
Note that all 1G/1H frequencies were received with 0 BER 24/7 in Thessaloniki before 1L began transmissions!
Giving a negative skew on the LNB eliminates completely the opposite polarization harmonics but does not affect the lower range which remains with a little improved but still way too low signal!
Hopefully the new 1M satellite will carry all these frequencies from now on and bring Astra to an even better condition that it was before 1L!
Also note that the only region that was not affected at all by 1L is the western side of Greece that was always in favour of receiving Astra, thus 1G/1H frequencies were already strong enough not to be affected to the extend we experience here in Northern Greece!
As for your question it is most certain that Astra 1M is received with no problem in Rhodes and the Aegean even with 60cm dishes!
Finally 1M had zero effect its opposite polarization frequencies in Northern Greece!