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There are countless examples of such "visual collisions", depending of the font used for display. I especially like the : vs. ꞉ which makes "Z꞉abc.xyz" a valid filename in the current directory. For instance:

Local $aDiff = [ _
    "EЕ", _
    ":꞉", _
    "ÐĐƉ", _
    "êȇ", _
    "eе", _
    "ΩΩ", _
    "OΟ" _

Local $c, $t
For $s In $aDiff
    $t = ""
    For $i = 1 To StringLen($s)
        $c = StringMid($s, $i, 1)
        $t &= $c & @TAB & AscW($c) & @LF
    MsgBox(0, "", $t)

This will expand as new scripts (written languages) are constantly added to the Unicode set. There are special measures taken for the URLs if/when Unicode is allowed there to avoid such pitfalls.

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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