I’m facing the same problem. I also disable my plugins one at the time to find the cause. The vSlider Dev messes up the plugin page. I tried to do as ewelin suggested and remove the updatecheck.php , but I guess I have to remove some line in vsliderdevphp as well, because when the update-file is removed I get this warning:
Warning: include_once(updatecheck.php) [function.include-once]: failed to open stream: No such file or directory in /home/diffner/public_html/mall2/wp-content/plugins/vsliderdev/vsliderdev.php on line 19
Warning: include_once() [function.include]: Failed opening 'updatecheck.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/diffner/public_html/mall2/wp-content/plugins/vsliderdev/vsliderdev.php on line 19
I guess I have to remove everything from line 19 to 51, but are not shore. Is that right?
But best would of cause to find out what is making this problem and fix it.
Something that was a bit frustrated, my slider that I had built disappeared when I activated the plugin again. Would be nice if the sliders stay even if the plugin is deactivated. For now I just got one slider, but for the site I’m building my theme I am going to have more then one.
I’m using wordpress 3.3.1
vSlider dev 1.0
my test site http://mall2.diffner.se
I have check this in both firefox 9.0.1 och IE 8