codeigniter - jQuery table header plugin misbehaves sometimes -

i @ wit's end attempting troubleshoot bug , hope can provide idea next. situation.

i programming dynamic site in php using codeigniter framework. have modified appearance of page heavily , incorporated jquery features. part of work-flow static version of page created can parse it, rather wrestle if php , mark-up both present. have validated, error-free page in static html works perfectly.

however, when modify php page, jquery plugin keeping table header in static position not work. appearances, page should work.

here checklist have gone through dozen times:

• jquery being called once. part of workflow static version streamlines code may come using work of others , different versions of jquery might have been available when plug-in created.
• jquery utilized non-working plug-in recent , 1 have elected run other jquery code have added. of other plugins called on older versions , running updated jquery source.
• jquery being called google api , loading other functions , events working in static , php versions of file.
• checked structure, classes , id's of div's ensure meet requirements of plug-ins being used.
• checked paths on css , js files make sure load. baseurl() function of codeigniter ensures these absolute.
• i using includes on php version call js , css files common views have created. troubleshooted these going without includes, opting hard code them in directly. no joy.
• tailed php error.log development stack. both static , php versions render no errors or warnings. php.ini file development stack set report errors , warnings.
• the virtual host definition site set-up not permit caching of css, js, html or php files. have gone far modify small tidbits (comments, re-position lines, etc.) of code ensure recent source code loaded in browser. changes appearing when view source or @ code in browser's developer tools.

thank taking time read this. if have ideas or suggestions, love read them.