Defect: Sometimes opened sql/txt files are unreadable in worksheet.

I haven't pinpointed the exact sequence of events yet. Sorry.
I work on two different machines. One: 64bit running Vista. Two: 32bit running XP.
They have the same fonts and operating system languages.
I keep a set of files I'm working on on a usb stick (which appears to be working perfectly).
Sometimes, but not always, when I open up a one of those files on the key, it shows up as square-box gibberish in the sql worksheet window.
I can open the same file with notepad just fine, and paste the contents into the same sql worksheet just fine.
But it's a darned nuisance, not to mention an opportunity to overwrite my work if I forget to close the open file in notepad and save it later.

I've had a few moments to try to track down more info on this problem.
I work on a 64bit vista machine at work and a 32bit windows xp machine at home.
I'm at home, so I'll post what I discovered here, and then post what happens on the 64bit when I get to work tomorrow.
All the files I'm discussing have only the standard ascii characters in them.
Both machines have the same fonts and font setup, and the same OS language. I do not believe this is a font or language issue.
I believe it may be an encoding issue.
I opened up a .txt file with sql developer. It happened to work fine this time.
I opened up the same .txt file with notepad, and saved it to a new .sql extension. It opened fine with sql developer.
I opened up the original .txt file with notepad and saved it to a new .txt filename and chose the unicode encoding instead of the ansi encoding that notepad was defaulting to. I also used notepad to save the file to another .txt file and chose a utf-8 encoding for it.
I opened up the unicode encoding file using sql developer and got gibberish. Upon closer inspection, I could actually read the code in the file, but each character had a box between it. I'll use [] to represent a box. So, my first line looked like this: [] [] []b[]e[]g[]i[]n[].
I opened up the utf encoding file using sql developer and got some gibberish, but most of the file looked fine.
My environment setting had UTF-8 as a setting.
I changed the environment setting to UTF_16, and re-opened the files.
The file saved as unicode is now readable and the other files are now complete gibberish.
I'm guessing that my work machine has a different default encoding scheme at the operating system level, because I believe both are set up with the same settings inside sql developer. (I used the same written instructions for both.)
I'll post what I find at work tomorrow.
If this turns out to be correct, it would be nice if sql developer automatically checked the encoding of the file when it was loaded and acted accordingly. That appears to be a possible course of action, because when I open up each of the encoded files in notepad, it (a) displays each of them correctly automatically and (b) when I do a save as, it shows the encoding the file was last saved in as the default value.

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Message was edited by:
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Defect: Sometimes opened sql/txt files are unreadable in worksheet.

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