Frank van Caspel

You guys are awesome for uncovering the issue so quickly. I'll shut up for now but will keep reading in case you want me to test something on my system.

Just to confirm: my physical keyboard layout is exactly like in the image I linked to in the startpost (except I have some extra keys like Fn), and in Windows my keyboard layout is set to United States (International).

I'm not 100% on the terminology, but yes: I think the key I'm referring to is the apostrophe key, and I think it's what you refer to as a dead key. The key I'm talking about is indicated in the image I link to in the start post, and when I press it once, it does not produce an immediate output. If followed by space it produces ', if followed by vowels it modifies it (áéíóúý). I thought this was standard behavior - I've never known it to behave differently. Do you think dead keys have something to...

Apologies, double post.

This is really weird: suddenly, without me changing anything the behavior has become inconsistent. Now sometimes I can load up TeXstudio with a basic example and the bug won't surface right away after me compiling once. But then after a while, without me doing anything, it does start happening. I've been testing a bit but I'm really not doing anything else to trigger it. I thought it might have been Alt-tabbing or typing other letters before 't that would prime the bug, but none of that's the case....

This is really weird: suddenly, without me changing anything the behavior has become inconsistent. Now sometimes I can load up TeXstudio with a basic example and the bug won't surface right away after me compiling once. But then after a while, without me doing anything, it does start happening. I've been testing a bit but I'm really not doing anything else to trigger it. I thought it might have been Alt-tabbing or typing other letters before 't that would prime the bug, but none of that's the case....

I'd be very glad to help, just give me pointers and I'll follow up. I've set F5 as a hotkey for 'About' and the behavior resurfaces. Now when I type 't, the About-screen pops up. Same as before in that it doesn't happen until a first Build & View has happened, and then occurs consistently.

I've had the same problem, but fixed it using Tim's advice. See this thread for bug #2241.