I have an RDR-DC90 and the EPG has the same issue. I, like you, did the version upgrade to 1.05 (system 1 upgrade) and tho that has been achieved okay. The EPG is still not working... Manual recording also does not work. Tuning finds channels, they just do not appear in the guide. Update is ON.
I'm not absolutely sure that this is what fixed the problem, but what I did was go thru the process of selecting Guide Plus as an alternative EPG, manual updating of the new EPG and then, re-setting for freeview. Two miintes later I have EPG again! But what a palaver. I am thinking to rent digital equipment in future - if it doesn't work, call them in to fix or replace!