See thread here for more on this problem. I was able to find a solution for my system:
forum.joomlaworks.net/index.php?topic=569.msg2297#msg2297

I'm running a local intranet for me and my neighbors, and I have the same problem but I don't know exactly where I need to check my "permissions".  I've looked at the showthumb.php file itself, but I don't see anything related to permissions.  Anything thoughts? ???

no, you won't see anything about permissions IN the file. You need to use CHMOD (in your FTP) to change the permissions associated with the module files and directory on the server/your mambo/joomla installation.

CHMOD:
en.wikipedia.org/wiki/Chmod

If you are setting up some kind of intranet, especially wifi, you better study up on permissions and other security issues!

See, I don't have to FTP anything... It's all on my "local" machine.. and as far as the securities go, they are well aware of big brother.. LOL..

Well you must be running off your own server then, a pc set up as a server maybe, with some kind of *nix system? CHMOD is a unix/linux/etc command. You still have file permissions you need to work with.

I'm having trouble with thumbs not showing up, too. I've implemented all the fixes that the minked frappe  :P drinker suggests:

• my permissions are set as suggested
• my XML declaration is killed
• I've disabled all the javascript on my site except that related to SIG--and the script used by GoDaddy.com to display Google Ads at the top of the screen on all their free, ad-supported hosting sites (like mine).

I can't turn the GoogleAd script off without actually (gasp!) paying for my hosting service! :o

Does anyone else out there use GoDaddy? Any luck with SIG? Would love to know!

--Luke

Well you must be running off your own server then, a pc set up as a server maybe, with some kind of *nix system? CHMOD is a unix/linux/etc command. You still have file permissions you need to work with.

Yes, my system is the server.. Actually XP Pro running wamp/apache/sql, etc..  Anyways, if there is a permission issue, then where do I resolve this? ???  Also what is the GD Image Library?

this stuff is basic. use google to look up CHMOD and GD Image Library. software support forums are not a good place for step-by-step instructions on fundamentals. the information is widely available already.

Alright guys,

Well I was having exactly the same issue and then noticed that all the jpg's that were not showing as thumbnails were not named in the standard way eg. had spaces, + etc in the title.

So I renamed a file to have say joe_blogg instead of joe+blogg and the thumbnail magically appeared!!!!

Hope this helps, not a perms issue

Nils

Hi;

I have the same problem and i have done everything, but it still doesnt work.

Guys, i think, it is nor about CHMOD etc. Because my thumbs were working fine. Then someday they began not to work. What is changed?

Only thing, which is changed during that time, is the UPDATES of BROWSERS.

Guys, The problem is not about CHMOD etc, it is about BROWSER UPDATES. (firefox and  IE)

I think, the turn is SIG teams.

Hi all,

I have just purchased and am having the same problem.

Works great but no thumbs.

Have chacked all of the above except the 'showthumb.php' bit, I cannot even find that file.

I tried the normal app, and it did not work so upgraded to pro thinking that might help.

Am am using the multi gallery option and have tried it at 0,1 and two.

Here is were I am developing it:
thegreatanzacrun.com/OBT/index.php

as you can see, there appears to be a space below it were I am guessing the thumbs should be.

Thnaks in advance.  Hopefully it is simple.

Hi sambob!

First , about the SIG PRO, please ask for support on the forum opened for this product, SIG PRO Forum .

Well, i just saw the link you give us and i see one picture on the top of the page.
If i click it, then run the slimbox effe and after that i can see all the pictures through the slimbox.

What is exactly the problem?
Can you describe it a bit more!?

Thank you!

Thanks Vinikey...

Makes sense now I think about it.  It was late and I was thinking something else.

I was thnking that the space below was were other 'mini' thumbs would. ( I have a q on that and layout change so I will start another thread)

Appreciate the response

Unfortunately my thumbnails also do not work.

Toe view: www.atthecardtable.com/autographs/index.php?option=com_content&task=view&id=16&Itemid=29

Do I need to create the thumbnails myself?

- Permissions are set correctly (tried 755 and 777) when clicking on the image it does work correctly.

Thanks in advance.

- Raenius

Hi there!

Cause the site is running under the folder autographs ( www.atthecardtable.com/autographs/ ) try this...

Open the file mambots/content/plugin_jw_sig/showthumb.php
and at the line 15 change this
to this
Check it out and come back to tell me if work. If not will found the solution, no worries!

Hi guys !

I had the same problem and solved it. :-*
I'm working on WinXP and installed EasyPHP 1.8 with Joomla 1.0.12.

Are you sure GD is well enabled ?

Look at this page : www.libgd.org/FAQ_PHP#How_do_I_get_gd_to_work_with_PHP.3F

How do I know which GD Version is used?

See phpinfo:

<?php
phpinfo();
?>

If you use the bundled PHP version, you will see something like in the result page:

gd
GD Support	enabled
GD Version	bundled (2.0.28 compatible)
FreeType Support	enabled
GIF Read Support	enabled
GIF Create Support	enabled
JPG Support	enabled
PNG Support	enabled
WBMP Support	enabled
XBM Support	enabled

How do I get gd to work with PHP?
Windows

The php_gd2.dll is included in a standard PHP installation for Windows, it's not enabled by default. You have to turn it on, the user may simply uncomment the line "extension=php_gd2.dll" in php.ini and restart the PHP extension.

Change:

#extension=php_gd2.dll

To:

extension=php_gd2.dll

Note that my line "#extension=php_gd2.dll" was prefixed with a ";" rather than a "#". Remove it, restart Apache and I hope this will be fixed for you too.

Hi there!

Cause the site is running under the folder autographs ( www.atthecardtable.com/autographs/ ) try this...

Open the file mambots/content/plugin_jw_sig/showthumb.php
and at the line 15 change this

$_image_ = '../../../images/stories/'.$_GET['img'];

to this

$_image_ = 'http://www.atthecardtable.com/autographs/images/stories/'.$_GET['img'];

Check it out and come back to tell me if work. If not will found the solution, no worries!

Hi and thanks for your reply!

Unfortunately this did not solve the issue...do you have another suggestion?

Hi again Raenius!

As you can see, at the link
www.atthecardtable.com/autographs/mambots/content/plugin_jw_sig/showthumb.php?img=buffy/benson_large.jpg&width=200&height=200&quality=80
where is used to create the thumb you can't see, there are the error
Try to enable "allow_url_fopen" in your php.ini file and come back to tell us if work this way!

Thank you!

Hi, back again.

Unfortunately your latest comment still did not solve the issue.

On this page: www.atthecardtable.com/autographs/mambots/content/plugin_jw_sig/showthumb.php?img=buffy/benson_large.jpg&width=200&height=200&quality=80

I now get the following errors:

Warning: imagecreate() [function.imagecreate]: Invalid image dimensions in /home/raenius/domains/atthecardtable.com/public_html/autographs/mambots/content/plugin_jw_sig/showthumb.php on line 36

Fatal error: Call to undefined function ImageCreateFromJpeg() in /home/raenius/domains/atthecardtable.com/public_html/autographs/mambots/content/plugin_jw_sig/showthumb.php on line 37

Any other suggestions?

- Exile

Hmmm... strange...
As said BibiJoom your server support the GD2 graphics library
and you are sure is installed right?

Cause the error you have now seems to exist cause that...

Can you check it out please?

Thank you!