TASK DEFINITION: Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
PROBLEM: Question: I'm a little bit confused with the following phrase. I was reading an article about concurrency in Java and there was a sentence saying: It is worth noting that both unlockRead() and unlockWrite() calls notifyAll() rather than notify(). This phrase seemed quite strange to me. What does it mean? 
Answer: "It is worth noting that" simply means "here's something, which you should remember:" or "here's something you should pay attention to:" or "here's something that is worth reading and remembering:" It's that simple. Regarding (1), there is no connection at all to "apropos" or "besides..." Regarding (2), it always means exactly the same thing. It simply means "Here's an interesting point:" (There is utterly no connection in any way to "useless" or "costs nothing".) It is worth noting that, the ELL site exists for basic questions about the meanings of phrases.

SOLUTION: yes

PROBLEM: Question: I was writing something along "... I could only read upto page 34" when my spell-check app Grammarly complained that I should rather use "up to". So, what's the difference between the two and is there really any difference? Or is it that the condensation "upto" is not technically allowed? 
Answer: Upto is a misspelling of up to. -- Wiktionary Use up to with a space between the two words. Also, as Yosef Baskin says: You can use the following self-test: Does the single word say something different from the two words? If not, stay with two words. By contrast, into and onto do mean things other than in to and on to, so they work as single words.

SOLUTION: yes

PROBLEM: Question: Possible Duplicate: Types of things vs. types of thing When using the phrase "types of" or "kinds of," it often seems appropriate to follow with a singular noun (e.g., types of rock), but at other times a plural noun sounds better (e.g., types of sentences). Is there some kind of rule about this? 
Answer: Here's a rule of thumb with which to decide the correct usage in any given case. Turn the phrase around: I like all kinds of music = I like music of all kinds I like all kinds of apple = I like apple of all kinds I like all kinds of apples = I like apples of all kinds And so on.

SOLUTION:
yes