[l2h] problem with alt tag: formula is broken!

[Alberto Buffolino]

Hello,
I am a latex (and latex2html) beginner user and use them (from just 1 
month or little more) to study tex mathematical document for university 
courses (first year).
Latex2html is currently and correctly installed on my local system 
(Windows XP sp3 32-bit), but I have a strange (and very annoying) 
problem: generating html (3.2, 4.0, 4.1, is the same thing) from tex 
file, I often receive in output one (or more) page where some long 
formulas (especially in the array element) are reported in a strange 
broken format in ALT tag of images.
Viewing HTML source, then, I have seen that (this thing is very strange) 
the MATH content is correctly imported by tex source file, and also the 
images are correctly generated.
An example?

<!-- MATH
  $\displaystyle {\lim_{n \to +\infty}} a^n = \left\{ \begin{array}{ll}
+\infty \ & \ a>1, \\
\par
1 \ & a=1, \\
0 \ & |a|<1, \\
\nexists \ & a \leq -1. \end{array} \right.$
  -->
<IMG
  WIDTH="250" HEIGHT="112" ALIGN="MIDDLE" BORDER="0"
  SRC="
img2.png"
  ALT="$ \displaystyle {\lim_{n \to +\infty}} a^n = \left\{ 
\begin{array}{ll}
+\infty \...
...a=1, \\
0 \ amp; \vert a\vertlt;1, \\
\nexists \ amp; a \leq -1. \end{array} \right. $">

In the images.log file there is no error... I am updated miktex package 
and nothing changes, I have tryed to modify some settings in l2conf.pm, 
but nothing changes... I have to convert a tex that, in pdf, results 107 
pages, and in HTML many too files, and this strange thing is potentially 
present 48 times! I should copy manually the tex formula everytime...
Help me!
Thanks in advance...
P.s.: I am Italian, so excuse me for my English... that is not very good.
Alberto