If you are using Simple Image Gallery plugin for Joomla 1.6, 1.7 or 2.5 you might have teh following issue.
On published image thumbnails you can see “CLICK_TO_ENLARGE” message instead of “Click to enlarge”
Also when you click on the image from the gallery a pop-up is opened with the following message “JW_SIG_NAVTIP” instead of navigation tip.
The reason for this is because 2 .ini files for Simple Image Gallery plugin have couple of capital letters and if you are using the Linux Web server you have a problem.
To resolve this FTP connect to your site and find these files:
en-GB.plg_content_jw_simpleImageGallery.ini
en-GB.plg_content_jw_simpleImageGallery.sys.ini
in public_html/administrator/language/en-GB
and rename those files to:
en-GB.plg_content_jw_simpleimagegallery.ini
en-GB.plg_content_jw_simpleimagegallery.sys.ini
Re-load the page with the gallery and the issue should be fixed.