Hiding tbody problem

Hiding tbody problem

I have searched the forum and cant seem to find anything relating to this.  I have a fixed layout table that uses a tbody with an image for the header, with the contents to display loaded in the next tbody.  I can expand and collapse the "contents" tbody using show() or hide(), however, in IE7 the rows are remaining visible and dissapear randomly.  This problem does not exist in Mozilla.  Additionally, if i remove the table-layout:fixed, everything works like it is supposed to in IE.  Has anyone seen this before or know what I might try to correct this?  Thank you in advance.
 
Joshua