I checked for differences between Win32 and Linux clients and found that:
- I can't use train portal signs in a Linux client: no action with a left click. Nevertheless I managed to change location once but I didn't see a dialog.
- Cyrillic input doesn't work in a Linux client but it works in a Win32 client. I can't use WSAD controls while my keyboard layout isn't English. There is no such problem in a Win32 client.
- A gray background instead of a mini-map.
PS: Tested on:
Ubuntu 15.10 (64 bit)
The X.Org Foundation 11702000
Win32 client tested on wine-1.8.
PPS: Moved to a helpdesk. Please, remove the topic.