diff -r 605729cc5bbf doc/faq/OctaveFAQ.texi
--- a/doc/faq/OctaveFAQ.texi	Wed Nov 02 11:17:01 2011 -0700
+++ b/doc/faq/OctaveFAQ.texi	Wed Nov 02 21:54:39 2011 +0100
@@ -596,6 +596,10 @@
 To subscribe to the list, go to @url{http://www.octave.org/archive.html}
 and follow the link to the subscription page for the list.
 
+To unsubscribe, go to the subscription page (as an example,
address@hidden://mailman.cae.wisc.edu/listinfo/help-octave}) and at the very
+end you find ``To unsubscribe from ...''.
+
 @strong{Please do not} send requests to be added or removed from the
 mailing list, or other administrative trivia to the list itself.
 
@@ -739,6 +743,19 @@
 questions (preferably with answers!)
 
 @itemize @bullet
+
address@hidden
+I downloaded the tar.gz and the tar.bz2 files but I can't get Octave to
+open on Windows.
+
+That's the source code.  There are several Windows programs that can
+uncompress those files, but then you would have to compile the source
+code yourself.
+
+What you seek is a Windows binary. You can find one here:
+
address@hidden://octave.sourceforge.net}
+
 @item
 Octave takes a long time to find symbols.
 
@@ -778,6 +795,63 @@
 @code{yum install octave-devel}
 
 @end itemize
+
address@hidden
+I have this bug in a specific function, ...
+
+Try running:
+
address@hidden unload all}
+
+If that unloads your function (i.e. it is not available anymore), it's
+not a GNU Octave function.  It is probably part of OctaveForge, so you
+better file a bug report at that mailing list.
+
address@hidden
+I'm writing an octave function to load a 3GB file and I'm having strange
+problems with this on my 32-bit system.
+
+The 32-bit version can't read files larger than about 2GB because Octave
+uses file offsets that are integers.
+
address@hidden
+Help! I'm getting error: memory exhausted or requested size too large for range of Octave's index type
+
+You might be trying to create an array greater than the biggest
+indexable memory area on your platform.  For instance, on 32-bit
+computers, it is impossible to index more than about 4295 million
+elements.  Notice that limit is true even if you have enough ram!
+
address@hidden
+I'm running Octave 3.2.4 on Windows and plotting doesn't work!
+
+Try removing oct2mat. Unload oct2mat if currently loaded:
+
address@hidden unload oct2mat}
+
+And if that solves you problem, you might want to make Octave remember not to load oct2mat at startup:
+
address@hidden rebuild -noauto oct2mat}
+
address@hidden Octave miscalculates simple arithmetics.  For example Octave doesn't think 3 * 0.1 is equal 0.3.
+
+Internally, computers use a format (binary floating-point) that cannot
+accurately represent a number like 0.1, 0.2 or 0.3 at all.
+
+When the code is interpreted, your ``0.1'' is already rounded to the
+nearest number in that format, which results in a small rounding error
+even before the calculation happens.
+
+Why do computers use such a stupid system, you might ask?  It is not
+stupid, just different. Decimal numbers cannot accurately represent a
+number like 1/3, so you have to round to something like 0.33 - and you
+do not expect 0.33 + 0.33 + 0.33 to add up to 1, either.
+
+Computers use binary numbers because they are faster at dealing with
+those, and because for most calculations, a tiny error in the 17th
+decimal place does not matter at all since the numbers you work with are
+not round (or that precise) anyway.
+
 @end itemize
 
 @node Using Octave
@@ -786,6 +860,8 @@
 @menu
 * How do I set the number of displayed decimals?::
 * How does Octave solve linear systems?::
+* How do I print things before the calculation is finished?::
+* How do I print the datatype of a variable?::
 @end menu
 
 @cindex Tips and tricks
@@ -817,6 +893,27 @@
 Sections ``Techniques Used for Linear Algebra'' and ``Linear Algebra on
 Sparse Matrices'' from the manual describe this procedure.
 
address@hidden How do I print things before the calculation is finished?
address@hidden How do I print things before the calculation is finished?
+
+I'm running some m-file that prints things as it moves along, but I
+don't get to see any of that until the m-file is finished. How do I make
+the output show up immediately?
+
+GNU Octave by default buffers all output and sends them to a pager. If
+you want to disable paging try calling @code{more off} or
address@hidden (0)}.
+
+See also @code{http://www.gnu.org/software/octave/doc/interpreter/Paging-Screen-Output.html}.
+
address@hidden How do I print the datatype of a variable?
address@hidden How do I print the datatype of a variable?
+
+Use @code{class (x)} to determine the value's class, which is probably
+what you wanted to do.  @code{typeinfo (x)} is used to debug the
+interpreter and might return distinctions that are important to the
+interpreter but not so much to the Octave language user.
+
 @node @sc{Matlab} compatibility
 @chapter Porting programs from @sc{Matlab} to Octave