[Freeciv] Two problems (Granary problem, City problem)

[Vladimir Niksic <vniksic@xxxxxxx>]

Sometimes I get this weird bug, that after playing a couple of hours 
(multiplayer, or single player) that I can't enter one of my cities. This 
problem almost always occurs. I click on the city I want to enter, and I just 
can't enter to build or do anything else. This happens without any kind of 
warning. The city is not occupied, nor rebellious. What could be the problem?

Second, I just got a wierd message today from the game:
Game: Canterbury is building Granary(*), which is no longer available.
Now, I've always been an expert on Civ1, and some Civ2 knowledge, but I have 
never had problems of this kind. I suddenly can't build any granaries, that 
be new or old cities. My friend that was playing with me said he could build 
granaries normally. Is, this a bug, or am I missing something, I have 
discovered Pottery a long time ago.

I apologise if there is something I've done wrong in the developing my 
civilisation, so I can't build granaries. If that is the case, can someone 
please correct me?