e-d-s got strings where it's "UID" and e-d-s got strings where it's "uid".
change all "uid" to "UID".

#: ../addressbook/libebook/e-book.c:3542
#, c-format
msgid "%s: there was no self contact uid stored in gconf"
msgstr "%s: Es gab keine in GConf gespeicherte Self-Contact-Benutzerkennung"

#: ../addressbook/libebook/e-contact.c:108
msgid "Unique ID"
msgstr "Eindeutige Kennung"

#: ../camel/providers/imap/camel-imap-folder.c:2561
#, c-format
msgid "Incomplete server response: no UID provided for message %d"

#: ../camel/providers/imap/camel-imap-folder.c:2574
#, c-format
msgid ""
"Unexpected server response: Identical UIDs provided for messages %d and %d"

#: ../addressbook/libebook/e-book.c:3672
#, c-format
msgid "%s: there was no source for uid `%s' stored in gconf."

#: ../camel/camel-folder.c:1278
#, c-format
msgid "Unsupported operation: search by uids: for %s"

#: ../camel/providers/nntp/camel-nntp-folder.c:175
#: ../camel/providers/nntp/camel-nntp-folder.c:207
#, c-format
msgid "Internal error: uid in invalid format: %s"

#: ../camel/providers/pop3/camel-pop3-folder.c:405
#, c-format
msgid "No message with uid %s"