I had this issue with the export/import feature in Workflow:

I exported my models from server 1 and imported them in server 2. When I created new processes in server 2, the process view was showing every font (in labels, task names, etc) in enormous size, making the process view unreadable.

After many hours of testing I found out that the two servers had different regional settings. Server 1 was set to "Portuguese (Portugal)" formats and server 2 was set to "English (United States)" format.

So, if you have this problem, just go to "Control Panel -> Regional and Language Options" and check if your options are the same in both servers. After that you have to restart your Workflow services and import the models again.

I've been told that this issue is going to be fixed in the future but until then I hope this post helps.

Tiago