By default Linux does not have much of a font selection and they mostly all look the same, so decided to import fonts from a Windows system so when I'm doing editing in gimp or w/e I get way more choices for nice fonts.

Since then, Thunderbird seems to like defaulting to some weird font that looks like this:

http://gal.redsquirrel.me/thumbs/lrg...creenshot6.png

Notice the TT. Every time two t's are together, and a few other letters, they're rendered as bolded. Very annoying. IT will even do it in real time if I reply to an email and type. I'm guessing whatever this font is, it's default in lot of mail clients, because even if I change the default in Thunderbird I still get tons of emails with this font. I did not want to post a real email due to privacy so just picked a random spam one to show an example.

Is there any way to make it render properly? I'm guessing this may not even be the only font that will do this, so even if I find and delete it, it's not really going to solve the real problem, which is crappy font rendering. Any way to fix this?

the obvious question here is:
how did you "import" which fonts from which windows system?

i suggest you undo that, there's a whole bunch of fonts available for linux and i'm sure your packet manager has something to offer.

or you change the default font(s) in thunderbird to some explicit font (i suggest the droid family) instead of just "sans serif" and "serif".

I just copied the files over from Windows to the font folder in Linux. I read somewhere online that the files are the same so they will work.

something obviously went wrong there.
why don't you just install fonts with your packet manager?
on my system (archlinux) i get 16 results when searching for "microsoft fonts".

Did not know fonts had to actually be installed, I guess I'll have to figure out how to remove the ones I added without removing the system ones then try that.

i never said that.
but it's recommended procedure, where available.

I can't seem to undo what I did, since the dates of the files are their original creation date and not the date I copied them, so I don't know which ones I'm suppose to delete. It's also a system folder (fonts:/) so I can browse it with command line either to look at file extensions. Maybe Linux fonts have a different extension than windows so I could maybe go by that.

Edit: Never occurred to me to even check the email source code, so I did, and I was able to tell what that bad font was and deleted that one. It seems good now. It was Calibri, for the record. Guess for whatever reason that font is not compatible with Linux. Now the emails default to another font that works ok.