Can't drop/replace lost table (no replies)

After cleanly restarting a MySQL 5.5.19 server, a few InnoDB tables could no longer be accessed with an error about missing data files in the log (there were no errors during the shutdown/startup). At first I tried setting innodb_file_per_table to 0 (I had enabled it previously but after most of the tables already existed), and some but not all of the previously innaccessible tables were accessible again. I decided to restore the remaining bad tables from a backup, but there is one that I can't seem to replace:

- I tried a simple "drop table" but I get an error saying that the table doesn't exist.
- I tried to check/repair the table, but I get the same error saying that it doesn't exist.
- I tried to delete the .frm file and create a new table in its place (after flushing tables) and I get an error saying the table already exists.
- I tried creating a dummy table and copying its .frm in place of the broken table, but after dropping the table I still can't create a new one with the same name.
- Tried recreating the table structure and copying that .frm in place of the existing one of the broken table, but I still get "table doesn't exist" when I try to access it.
- My last try was to delete the .frm and replace it with a dummy MyISAM table. I noticed that I could rename that table from and back to the broken table's name, but I still get the "table already exists" error if I drop the table and create an InnoDB table in its place or change the MyISAM table engine type to InnoDB.

Anyone have any other ideas?