Copying project changes behaviour

First,
I didnt see a general category to post this in, so I just took the blueprints section since it affects blueprints/code.

My team uses SVN as source control for our project, but ive noticed something strange today: After making additions to the code, i commited my changes to the repository and asked my team members to update and check if everything was working on their end. They did, but reported several problems. Since my project was fully synced up, according to SVN, I couldnt explain those problems, so I started some testing. I downloaded the project from the SVN into a new folder and guess what: I now had the problems as well!

But I thought, my local project is supposed to be identical to the one on the repository, so whats going on? I then copied my whole local project (including intermediate and saved folders, that were not synced up), just to find out that simply copying the project induces these problems. Has anyone ever encountered something like this?

Did you make any changes to C++ code?

We dont actually use C++, we just added an empty class to get dedicated server working. We do have some Plugins that have C++, but havent touched those at all.