For instance, when I search for "std.jpg", it assumes it's a filename in the URL, and throws a not found page instead.

Also related to search so I figured I might as well use this topic:

Searching posts by username yields false results, eg:

https://www.lfs.net/forum/-1/search/user:%22Victor%22

Will also return posts from VictorMateus123 and victor_12.

yeah hum, not sure what to do about that. I think you DO want to be able to search partial usernames, no?

When you put it that way, Yeah. I didn't think of that.

But I found the issue (?) by clicking your name -> Forum posts. In that case I expected to find your posts only.

yes. Will ponder about what is the best way to indicate literal search. Can't really do quotes because those indicate spaces in a username, which could still mean you want to search by partial. So it'd have to be something else.
I must still make the search bar (more) intelligent - i could add an autocomplete for usernames (ie. it'd search for usernames and present you with the options). Then you wouldn't have to search for partial usernames either and would solve the inconsistency.