Either プロデューサー or プロデューサ is fine. Fairly sure (though not certain) that 演出家 refers to a stage producer.

Hah, whoops – I didn’t even see that. I must have started reading at the first numbered point. =P

But yeah, you’ve gotta be careful when typing an ん followed by a な-line or あ-line character when using an IME – if you type “konnichi” you’re going to get こんいち, because the double-n produces just the ん. You either need to type “kon’nichi” or “konnnichi” (yep, that’s a triple n). I usually go for the latter – it’s easier than going for the apostrophe key, especially on the iPad.

There’s similar things to keep in mind when trying to type something like んあ (though the only example of something like that I can think of off the top of my head is Tian’anmen Square, but that’s Chinese…). Typing “na” will get you な – you need to type “n’a” or “nna”.

1. Well, “今、日本語を勉強します” is kind of an odd thing to say. “Now, I study Japanese”?

To be fair, “now I will study Japanese” is a slightly odd thing to say in English too. You’re not really saying “now” meaning “at this current point in time” – the meaning in this sentence is more of an interjection, like “alrighty, I’ll study some Japanese”. What you meant to say was something like “I intend to study Japanese”, while the suggested correction is “Now, I am studying Japanese”

Possibly the sentence you’re after is 日本語を勉強しようと思います – I think I’ll study Japanese.

2. 行く means “go [to some place]” – it’s not the same as “going to study” in English. もっと勉強しに行きます means you’re going to some place with the purpose of doing study. Another weird thing about English – again, you don’t mean you’re going somewhere to study, it means you intend or plan to study.That’s basically what the suggested correction is – もっと勉強するつもりです = “I intend to do more study”.

する = plain form of します. Also called the dictionary form.

3. 習う basically means you’re learning from someone else – they teach you, you learn at the same time. Again, the meaning you’re after here is closer to “I want to study Japanese” – hence the correction.

Basically, it seems to me that all three of these confusions arise because you’ve thought of a sentence in English, are are trying to translate it word-for-word into Japanese. You need to pay close attention to the meaning of the sentence rather than the words of the sentence – English and Japanese just don’t work the same in many respects. For that matter, English is a bit of a crazy one as far as most languages go…

Different things have different counting words – for example, small animals use 匹 (ひき), birds use 羽 (わ), books use 冊 (さつ), flat things use 枚 (まい), long thin things use 本 (ほん), machines use 台 (だい), et cetera, et cetera. Generic “things” use the Japanese reading of numbers with つ. There’s a big list. Most of them have occasional exceptions – typically for four, six and eight, and occasionally three or ten. (Though they’re never so extreme as the exceptions for 人. Or 日. Boy, does 日 have exceptions.)

More info: http://en.wikipedia.org/wiki/Japanese_counter_word

Because the correcters are blind and/or don’t know what they’re talking about. As an intransitive verb, 乗る never has a direct object, so を is not used – it’s always に.

It’s pretty much all etymology. I guess if you take a slice through the middle of 火, you can see where the 点 radical comes from. I do agree 洗 from 水 is a bit weird. The left side of 次 has a similar origin, and it’s got one fewer strokes. The left side of 持 comes from 手, like someone knocked its hat off, and the left side of 忙 comes from 心 – did someone grab it and yank it out straight? =P

It helps me when memorizing to think of the radical in 点 as fire, but that may well just be me. So wish there was an easy way to type the radicals, but the IME doesn’t suggest them as options, even when I enter their names…

I wonder if you’re applying the のに too broadly? To me, the sentence reads “Even though I’m not the company president, I make those kinds of important decisions – {new concept:} and I don’t expect things will end well.” Paraphrased that last clause a little, though. =)

That is to say, the のに reflects on the 私が決める, while いいはずがない is a conclusion that results from that.