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The new tree is based on the official TeX Live release with an updated tree of local addons. While most documents developed under TeX Live will process fine under the new TeX tree we encourage authors to switch their development environments to the latest TeX Live if you have not done so already.
Many modules not included in the core TeX Live release and maintained in our local tree have been updated to the most recent version [so long as the update does not drastically change or break existing documents]. Modules with little or no recent usage have been dropped from our local tree. Please contact us if there are modules not include in TeX Live or our locally maintained tree that you would like to see added. In most cases you will want to add customized packages to your submission.
Widely used packages may be added to our local tree for the convenience of large disciplines. More on package update policies: Our goal is to provide a stable TeX processing system where we are able to reprocess papers from TeX source at any point in the future. This preserves the original presentation look-and-feel of the paper. This forces arXiv to limit updates to our TeX tree once we move it into production since thousands of papers depend on the stability of the current tree.
Introducing package updates that change existing papers is not acceptable. Therefore, once in production, we do not update the TL release via the tlmgr command. Special exceptions are made in narrow well defined cases for bug fixes that are critical to a large community of authors. During the development process the update processed introduced bugs and broke existing papers more than once so we are extremely cautious when it comes to updates. Updating commonly used packages in the main TL distribution is time consuming since we need to guarantee that existing papers are not adversly impacted by such a change.
Adding new packages not included in TeX Live is possible by adding the package to our local tree. Updating existing packages in the distribution or local tree is difficult. Options for updating existing packages.
One option is to include the modified package with your submission. Another option, for packages expected to be used by many authors, is to provide a modified version that does not conflict with existing packages that may be added to our local tree. If you see the need to include a large package hierarchy with you submission please contact us before including significant portions of a TeX Live tree. Our goal is to update our TeX Live distribution every few years.
Since we maintain all previous trees the overhead of frequent updates is significant. This schedule will depend on the frequency of updates to TeX Live and the demand for these updates for arXiv submissions.
We realize this is a major upgrade from TeX Live to The new tree contains thousands of improvements and bug fixes over the previous tree. Users may choose to replace older documents where such updates will improve the rendering of documents impacted by bugs in the previous TLbased tree.
If you are replacing a paper with older TeX source that rendered fine under the previous release we strongly encourage you to carefully examine your final PDF. The psfig license is 'non-free' which is incompatible with the inclusion policies of the TeX Live organization and as such all support for psfig has been removed from the TeX Live release.
The psfig package is largely superseded, for various reasons, including its non-free licence. For new work, users are strongly encouraged to use the LATEX graphics bundle, specifically, either the graphicx or even epsfig package.
In particular, epsfig, which is always to be found in modern distributions, implements a close analogue of the syntax of psfig. The problem of unresolved citations is due to the load order of the cleveref and hyperref packages. The hyperref package must be loaded prior to loading cleveref package. This results in the hyperref module getting loaded after cleveref module and since both modules redefine low level macros hyperref ends up redefining the ones cleveref defined earlier. In the past if the user attempted to load the hyperref package they would see option clash errors.
These issues often resulted in authors disabling the automatic hyperref inclusion. Our TeX processing module has been modified to include the hyperref package before the cleveref package. This enforces the load order dependency and eliminates unresolved citations. The code has also been modified to recognize user included hyperref inclusion to eliminate options conflicts. You no longer need to explicitly include hyperref package as our code now does this automatically [before cleveref package].
If you have been developing with an older biblatex you will need to regenerate your. TikZ and PGF graphics packages. Reports from users indicate there are problems with these packages in our older TeX Live system. We observed improvements to graphics in some TeX Live submissions that were processed under the new TeX Live tree.
Users who experienced issues with these packages may wish to replace their documents in order to take advantage of the latest enhancements and bug fixes for these packages.
Most of the advice below still applies. As of 31 December arXiv is running texlive with a new, updated and enhanced tree of local addons, for processing all new submissions and replacements. This represents a significant improvement over the aging teTeX system but will likely be slightly disruptive initially. Submitters may have to change some of their bad habits, and possibly adjust some TeX sources. The good news is that the arXiv installation has been kept very close to the official texlive system with very few local customizations and modifications.
Texlive is one of the current comprehensive mainstream tex systems available for most platforms and as live DVD. Therefore authors with up to date TeX system should encounter fewer surprises and problems. There are some incompatibilities with previous version of natbib arXiv's previous version was 7. We recommend to adjust sources to use the current version of natbib. If all else fails, bundle your version of natbib.
TeX Live changes that may impact some arXiv users: From psfig's CTAN page: Issues currently under investigation: These issues currently involve packages from the main TL distribution.
We are working with TeX community to learn more about this issue. Recent versions of pdfpages now use lscape such that some of our users are experiencing unwanted page rotations.
We are working to resolve this issue with the package maintainers. XXX file with nohypertex directive. In the event conflicts are due to system packages included in your paper you may still need to turn off our hyperref inclusion. An incomplete list of common symptoms, errors, and fixes follows: Wrong biblatex format version If you have been developing with an older biblatex you will need to regenerate your. Therefore authors with up to date TeX system should encounter fewer surprises and problems An incomplete list of common symptoms, errors, and fixes follows: The typical symptoms are!
Bibliography not compatible with author-year citations. See the natbib package documentation for explanation.
The submission must be made compatible with natbib version 8.