I have 3.0.1016.3 version installed. Sometimes when I upload a file it gets into a loop of retrial. I had faced the same problem with earlier version but when uploaded without queuing it used to give an file mismatch error but the upload was successful.
In the latest version there is no way to upload without queing up. I believe the retrial is happening because of file mismatch. If i cancel the retrial and I check, the file is uploaded properly.
[12:41:29] SYST
[12:41:29] 215 Windows_NT
[12:41:29] Detected Server Type: Windows NT
[12:41:29] FEAT
[12:41:30] 211-FEAT
[12:41:30] SIZE
[12:41:30] MDTM
[12:41:30] 211 END
[12:41:30] TYPE I
[12:41:31] 200 Type set to I.
[12:41:31] REST 0
[12:41:31] 350 Restarting at 0.
[12:41:31] PWD
[12:41:32] 257 "/" is current directory.
[12:41:32] TYPE A
[12:41:32] 200 Type set to A.
[12:41:32] PASV
[12:41:33] 227 Entering Passive Mode (67,225,139,74,21,210).
[12:41:33] Passive ip address returned from server different from server ip.
[12:41:33] Opening data connection to 67.225.139.74 Port: 5586
[12:41:33] LIST -aL
[12:41:33] 125 Data connection already open; Transfer starting.
[12:41:33] 551 bytes transferred. (1.18 KB/s) (453 ms)
[12:41:34] 226 Transfer complete.
[12:42:04] NOOP
[12:42:04] 200 NOOP command successful.
[12:42:25] CWD /httpdocs
[12:42:25] 250 CWD command successful.
[12:42:25] PWD
[12:42:26] 257 "/httpdocs" is current directory.
[12:42:26] PASV
[12:42:26] 227 Entering Passive Mode (67,225,139,74,21,217).
[12:42:26] Passive ip address returned from server different from server ip.
[12:42:26] Opening data connection to 67.225.139.74 Port: 5593
[12:42:26] LIST -aL
[12:42:27] 125 Data connection already open; Transfer starting.
[12:42:31] 226 Transfer complete.
[12:42:31] 69934 bytes transferred. (14.6 KB/s) (00:00:04)
[12:42:40] TYPE I
[12:42:40] 200 Type set to I.
[12:42:40] SIZE gss.xsl
[12:42:41] 550 gss.xsl: The system cannot find the file specified.
[12:42:41] MDTM gss.xsl
[12:42:41] 550 gss.xsl: The system cannot find the file specified.
[12:42:41] TYPE A
[12:42:42] 200 Type set to A.
[12:42:42] PASV
[12:42:42] 227 Entering Passive Mode (67,225,139,74,21,218).
[12:42:42] Passive ip address returned from server different from server ip.
[12:42:42] Opening data connection to 67.225.139.74 Port: 5594
[12:42:42] LIST -aL
[12:42:43] 125 Data connection already open; Transfer starting.
[12:42:47] 226 Transfer complete.
[12:42:47] 69934 bytes transferred. (13.9 KB/s) (00:00:04)
[12:42:48] TYPE I
[12:42:48] 200 Type set to I.
[12:42:48] SIZE sitemap.xml
[12:42:48] 213 180971
[12:42:48] MDTM sitemap.xml
[12:42:49] 213 20080323075624
[12:42:50] SIZE sitemap.xml.gz
[12:42:50] 550 sitemap.xml.gz: The system cannot find the file specified.
[12:42:50] MDTM sitemap.xml.gz
[12:42:51] 550 sitemap.xml.gz: The system cannot find the file specified.
[12:42:51] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:43:00] STAT gss.xsl
[12:43:01] 213-status of gss.xsl:
[12:43:01] 05-27-08 03:14AM 13236 gss.xsl
[12:43:01] 213 End of status.
[12:43:01] MDTM gss.xsl
[12:43:02] 213 20080527071414
[12:43:02] STAT sitemap.xml.gz
[12:43:02] 213-status of sitemap.xml.gz:
[12:43:03] 05-27-08 03:14AM 8147 sitemap.xml.gz
[12:43:03] 213 End of status.
[12:43:03] MDTM sitemap.xml.gz
[12:43:03] 213 20080527071415
[12:43:24] STAT sitemap.xml
[12:43:24] 213-status of sitemap.xml:
[12:43:25] 05-27-08 03:14AM 225989 sitemap.xml
[12:43:25] 213 End of status.
[12:43:25] MDTM sitemap.xml
[12:43:25] 213 20080323075624
[12:43:30] STAT sitemap.xml
[12:43:31] 213-status of sitemap.xml:
[12:43:31] 05-27-08 03:14AM 225989 sitemap.xml
[12:43:31] 213 End of status.
[12:43:31] MDTM sitemap.xml
[12:43:32] 213 20080323075624
[12:43:36] STAT sitemap.xml
[12:43:37] 213-status of sitemap.xml:
[12:43:37] 05-27-08 03:14AM 225989 sitemap.xml
[12:43:38] 213 End of status.
[12:43:38] MDTM sitemap.xml
[12:43:38] 213 20080323075624
[12:43:47] STAT sitemap.xml
[12:43:47] 213-status of sitemap.xml:
[12:43:48] 05-27-08 03:15AM 225989 sitemap.xml
[12:43:48] 213 End of status.
[12:43:48] MDTM sitemap.xml
[12:43:48] 213 20080323075624
[12:43:58] STAT sitemap.xml
[12:43:58] 213-status of sitemap.xml:
[12:43:59] 05-27-08 03:15AM 225989 sitemap.xml
[12:43:59] 213 End of status.
[12:43:59] MDTM sitemap.xml
[12:43:59] 213 20080323075624