As my title says, it seems that when updating, the [phpbb]_styles_template_data stores the path to the "install" folder and files within it. Since I am deleting the folder after updating the backend to RC3 (this occured when updating RC1 to RC2 as well), this causes the ACP to error when you try to Refresh the templates, since it will not find this folder and the files contained within.

Under Styles > Template > Prosilver: Edit it would list;
"../../install/" etc.

The solution I did myself was to go to the _styles_template_data and delete the last entries that was stored with install under template_filename and I could successfully continue to use the ACP again as it should be working, refreshing the templates successfully.

I do not however know why the install files was "cached" into the database, but it renders it broken if a person is to refresh the cache. I am using a edited version of the prosilver theme that comes with the boards if that is of any help. I have also managed, by deleting as above, to fix my own boards, but I figured this is something that might be an idea to look into.

Please forgive me if this has already been submitted, performing a search did not for me list any such reports.