Powergeopak 08.11.09.878 we are having issues with our aerail images showing up.

Ever since we upgraded to Powergeopak 08.11.09.878 we are having issues with our aerail images showing up.  We have the tifs attached to a reference file.  When that file is attached, everything shows up, but more times than not, when a file is opened those images do not show up.  We can detach the reference file and re-attach is they show up, but once you leave the file and come back same issue.  Has anyone else had this issue and found a solution.