Not really a bug BUT something I find causes problems

[Overkill77]

In this image you can see that the hud changes your resolution twice and changes mat_aaquality, this causes tf2 to take sometimes up to 1 minute while your monitor/gpu tries to figure out whats happening. This wouldnt have been that much of a problem besides the fact that if a user alt-tabs while the hud is doing this res switch, it makes your monitor blank until the tf2 process is closed.