Author: goldstern

Description:
I use Mozilla Firefox and Epiphany on Linux; I am a registered user on the
Polish wikipedia.
When I view the page http://pl.wikipedia.org/wiki/Operator_Laplace'a , there
should be several
formulas on the page, the first one is (in correct Latex) coded as

:<math>
\triangle f = div\ \overline{grad}\ f
</math>

Instead of each formula, I see the following text:

Parser nie mógł rozpoznać (Nie można utworzyć lub zapisywać w wyjściowym
katalogu dla wzorów matematycznych): \triangle f = div\ \overline{grad}\ f

(This is a Polish error message; "nie mozna utworzyc lub zapisywac w ...
katalogu dla wzorow" means, as far as I can tell, "cannot create/write in the
directory for formulas")

Notes:

1. When I download the page with wget, or lynx -dump (as unregistered user), or

w3m (as a registered user),

I see the same error messages. 
Ditto when I use Mozilla firefox or Windows Explorer on Windows XP.

2. When I do any of the following, the error messages will disappear and the

formulas are displayed correctly:

a. click "edytuj" (edit this page), and then click the preview button "podglad"
b. Change my "preferencje" (user preferences) to use some other language

(specifically, I tried this with

English, German, Hebrew), then go back to "Operator Laplace'a", and reload

the page.

(When I then change my language to Polish, and reload, the error messages

come back.)

3. I had a similar problem on the English Wikipedia with the article

http://en.wikipedia.org/wiki/Cichon%27s_diagram .

The error message were in English (but I do not recall the exact text). 
However, when I did a "null edit" (i.e., I clicked the edit button, did not

do any changes, then saved the article),

all the error messages had disappeared, and the formulas appeared correctly.

(Note: the null edit does not show up

in the history of that page.) 
Hence: please do not edit the page, or else the error might disappear and

will be harder to trace.

Thank you for any help or advice.

Martin Goldstern

Version: unspecified
Severity: normal
OS: Linux
Platform: PC