When I try to install or remove applications I get the following error:

Nokia-N900:~# apt-get install speedpatch
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
speedpatch
0 upgraded, 1 newly installed, 0 to remove and 26 not upgraded.
5 not fully installed or removed.
Need to get 0B/2606B of archives.
After this operation, 69,6kB of additional disk space will be used.
dpkg: parse error, in file `/var/lib/dpkg/available' near line 29239 package `macchanger':
EOF during value of field `Maemo-Icon-26' (missing final newline)
E: Sub-process /usr/bin/dpkg returned an error code (2)

How do I fix this?